/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/concurrent_increment.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:04:26,813 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:04:26,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:04:26,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:04:26,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:04:26,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:04:26,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:04:26,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:04:26,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:04:26,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:04:26,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:04:26,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:04:26,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:04:26,953 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:04:26,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:04:26,953 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:04:26,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:04:26,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:04:26,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:04:26,953 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:04:26,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:04:26,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:04:26,954 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:04:26,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:04:26,954 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:04:26,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:04:26,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:04:26,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:04:26,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:04:26,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:04:26,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:04:26,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:04:26,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:04:26,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:04:26,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:04:26,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:04:26,956 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:04:26,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:04:26,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:04:27,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:04:27,193 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:04:27,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:04:27,196 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:04:27,200 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:04:27,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/concurrent_increment.bpl [2022-03-01 17:04:27,201 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/concurrent_increment.bpl' [2022-03-01 17:04:27,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:04:27,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:04:27,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:04:27,220 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:04:27,220 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:04:27,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,235 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,239 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:04:27,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:04:27,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:04:27,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:04:27,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:04:27,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,248 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,248 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,250 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:04:27,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:04:27,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:04:27,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:04:27,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/1) ... [2022-03-01 17:04:27,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:04:27,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:27,293 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:04:27,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:04:27,328 INFO L124 BoogieDeclarations]: Specification and implementation of procedure dec given in one single declaration [2022-03-01 17:04:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure dec [2022-03-01 17:04:27,329 INFO L138 BoogieDeclarations]: Found implementation of procedure dec [2022-03-01 17:04:27,329 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:04:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:04:27,329 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:04:27,329 INFO L124 BoogieDeclarations]: Specification and implementation of procedure inc given in one single declaration [2022-03-01 17:04:27,329 INFO L130 BoogieDeclarations]: Found specification of procedure inc [2022-03-01 17:04:27,329 INFO L138 BoogieDeclarations]: Found implementation of procedure inc [2022-03-01 17:04:27,330 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:04:27,375 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:04:27,376 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:04:27,458 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:04:27,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:04:27,467 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-01 17:04:27,469 INFO L202 PluginConnector]: Adding new model concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:04:27 BoogieIcfgContainer [2022-03-01 17:04:27,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:04:27,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:04:27,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:04:27,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:04:27,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:04:27" (1/2) ... [2022-03-01 17:04:27,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5addaa28 and model type concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:04:27, skipping insertion in model container [2022-03-01 17:04:27,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "concurrent_increment.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:04:27" (2/2) ... [2022-03-01 17:04:27,481 INFO L111 eAbstractionObserver]: Analyzing ICFG concurrent_increment.bpl [2022-03-01 17:04:27,491 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:04:27,491 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:04:27,491 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:04:27,491 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:04:27,520 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,520 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,521 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,521 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,521 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,522 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,522 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,522 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,523 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,523 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,523 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,523 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,524 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,524 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,524 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,525 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,525 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,525 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,526 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,526 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,536 WARN L322 ript$VariableManager]: TermVariabe incThread1of1ForFork0_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,538 WARN L322 ript$VariableManager]: TermVariabe decThread1of1ForFork1_i not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-01 17:04:27,540 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 17:04:27,572 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:04:27,577 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:04:27,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 17:04:27,585 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-03-01 17:04:27,605 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 17:04:27,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:27,612 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:27,613 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:27,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:27,623 INFO L85 PathProgramCache]: Analyzing trace with hash 566903393, now seen corresponding path program 1 times [2022-03-01 17:04:27,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:27,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660274120] [2022-03-01 17:04:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:27,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:27,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660274120] [2022-03-01 17:04:27,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660274120] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:27,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:27,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-01 17:04:27,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597246732] [2022-03-01 17:04:27,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:27,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-01 17:04:27,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:27,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-01 17:04:27,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:04:27,854 INFO L87 Difference]: Start difference. First operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:27,913 INFO L93 Difference]: Finished difference Result 86 states and 167 transitions. [2022-03-01 17:04:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-01 17:04:27,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 17:04:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:27,922 INFO L225 Difference]: With dead ends: 86 [2022-03-01 17:04:27,922 INFO L226 Difference]: Without dead ends: 79 [2022-03-01 17:04:27,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-01 17:04:27,927 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:27,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-01 17:04:27,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2022-03-01 17:04:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 67 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:27,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 132 transitions. [2022-03-01 17:04:27,985 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 132 transitions. Word has length 12 [2022-03-01 17:04:27,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:27,985 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 132 transitions. [2022-03-01 17:04:27,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:27,985 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 132 transitions. [2022-03-01 17:04:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:27,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:27,987 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:27,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:04:27,988 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:27,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1642609806, now seen corresponding path program 1 times [2022-03-01 17:04:27,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:27,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577258416] [2022-03-01 17:04:27,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:27,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:28,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:28,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:28,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577258416] [2022-03-01 17:04:28,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577258416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:28,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706196132] [2022-03-01 17:04:28,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:28,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:28,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:28,067 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:28,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:04:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:28,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:04:28,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:28,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:28,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706196132] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:28,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:28,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:04:28,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320205673] [2022-03-01 17:04:28,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:28,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:04:28,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:28,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:04:28,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:04:28,312 INFO L87 Difference]: Start difference. First operand 68 states and 132 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:28,405 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2022-03-01 17:04:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:04:28,406 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:28,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:28,407 INFO L225 Difference]: With dead ends: 108 [2022-03-01 17:04:28,407 INFO L226 Difference]: Without dead ends: 108 [2022-03-01 17:04:28,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:28,409 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 35 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:28,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 59 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:28,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-01 17:04:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2022-03-01 17:04:28,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:28,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 131 transitions. [2022-03-01 17:04:28,417 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 131 transitions. Word has length 15 [2022-03-01 17:04:28,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:28,417 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 131 transitions. [2022-03-01 17:04:28,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:28,417 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 131 transitions. [2022-03-01 17:04:28,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:28,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:28,418 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:28,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:28,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:28,640 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:28,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:28,641 INFO L85 PathProgramCache]: Analyzing trace with hash -119292156, now seen corresponding path program 1 times [2022-03-01 17:04:28,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:28,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913985962] [2022-03-01 17:04:28,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:28,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:28,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:28,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913985962] [2022-03-01 17:04:28,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913985962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:28,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:28,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:04:28,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003137633] [2022-03-01 17:04:28,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:28,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:28,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:28,680 INFO L87 Difference]: Start difference. First operand 66 states and 131 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:28,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:28,784 INFO L93 Difference]: Finished difference Result 115 states and 220 transitions. [2022-03-01 17:04:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:04:28,785 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:28,786 INFO L225 Difference]: With dead ends: 115 [2022-03-01 17:04:28,786 INFO L226 Difference]: Without dead ends: 107 [2022-03-01 17:04:28,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:04:28,787 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:28,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 59 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-01 17:04:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2022-03-01 17:04:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2022-03-01 17:04:28,796 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 15 [2022-03-01 17:04:28,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:28,796 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2022-03-01 17:04:28,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2022-03-01 17:04:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:28,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:28,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:28,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:04:28,798 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:28,798 INFO L85 PathProgramCache]: Analyzing trace with hash 2125833014, now seen corresponding path program 2 times [2022-03-01 17:04:28,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:28,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748065723] [2022-03-01 17:04:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:28,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:28,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:28,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:28,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748065723] [2022-03-01 17:04:28,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748065723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:28,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390564811] [2022-03-01 17:04:28,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:04:28,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:28,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:28,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:28,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:04:28,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:28,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:04:28,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:28,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:29,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390564811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:29,036 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:29,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:04:29,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134618446] [2022-03-01 17:04:29,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:29,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:04:29,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:04:29,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:04:29,038 INFO L87 Difference]: Start difference. First operand 66 states and 129 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:29,147 INFO L93 Difference]: Finished difference Result 159 states and 301 transitions. [2022-03-01 17:04:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:04:29,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:29,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:29,149 INFO L225 Difference]: With dead ends: 159 [2022-03-01 17:04:29,149 INFO L226 Difference]: Without dead ends: 159 [2022-03-01 17:04:29,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:04:29,151 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:29,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 87 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-01 17:04:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 70. [2022-03-01 17:04:29,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.028985507246377) internal successors, (140), 69 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2022-03-01 17:04:29,160 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 15 [2022-03-01 17:04:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:29,161 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2022-03-01 17:04:29,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2022-03-01 17:04:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:29,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:29,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:29,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:29,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-01 17:04:29,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1430480948, now seen corresponding path program 2 times [2022-03-01 17:04:29,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:29,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423389640] [2022-03-01 17:04:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:29,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:29,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:29,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423389640] [2022-03-01 17:04:29,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423389640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:29,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:29,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:04:29,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264663523] [2022-03-01 17:04:29,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:29,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:29,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:29,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:29,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:29,421 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:29,479 INFO L93 Difference]: Finished difference Result 109 states and 210 transitions. [2022-03-01 17:04:29,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:04:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:29,480 INFO L225 Difference]: With dead ends: 109 [2022-03-01 17:04:29,480 INFO L226 Difference]: Without dead ends: 107 [2022-03-01 17:04:29,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:04:29,482 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:29,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 45 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:29,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-01 17:04:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2022-03-01 17:04:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0256410256410255) internal successors, (158), 78 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 158 transitions. [2022-03-01 17:04:29,490 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 158 transitions. Word has length 15 [2022-03-01 17:04:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:29,491 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 158 transitions. [2022-03-01 17:04:29,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,491 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 158 transitions. [2022-03-01 17:04:29,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:29,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:29,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:29,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 17:04:29,492 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1165608656, now seen corresponding path program 3 times [2022-03-01 17:04:29,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:29,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936071726] [2022-03-01 17:04:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:29,527 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:29,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936071726] [2022-03-01 17:04:29,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936071726] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:29,530 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:29,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:04:29,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375445202] [2022-03-01 17:04:29,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:29,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:29,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:29,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:29,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:29,533 INFO L87 Difference]: Start difference. First operand 79 states and 158 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:29,603 INFO L93 Difference]: Finished difference Result 99 states and 196 transitions. [2022-03-01 17:04:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:04:29,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:29,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:29,605 INFO L225 Difference]: With dead ends: 99 [2022-03-01 17:04:29,605 INFO L226 Difference]: Without dead ends: 99 [2022-03-01 17:04:29,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:04:29,609 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:29,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 42 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-01 17:04:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2022-03-01 17:04:29,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 139 transitions. [2022-03-01 17:04:29,618 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 139 transitions. Word has length 15 [2022-03-01 17:04:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:29,618 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 139 transitions. [2022-03-01 17:04:29,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 139 transitions. [2022-03-01 17:04:29,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:29,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:29,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:29,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 17:04:29,620 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:29,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:29,620 INFO L85 PathProgramCache]: Analyzing trace with hash -813881904, now seen corresponding path program 3 times [2022-03-01 17:04:29,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:29,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264704014] [2022-03-01 17:04:29,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:29,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:29,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:29,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264704014] [2022-03-01 17:04:29,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264704014] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:29,647 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:29,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:04:29,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121490375] [2022-03-01 17:04:29,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:29,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:29,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:29,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:29,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:29,648 INFO L87 Difference]: Start difference. First operand 70 states and 139 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:29,734 INFO L93 Difference]: Finished difference Result 130 states and 249 transitions. [2022-03-01 17:04:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:04:29,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:29,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:29,738 INFO L225 Difference]: With dead ends: 130 [2022-03-01 17:04:29,738 INFO L226 Difference]: Without dead ends: 127 [2022-03-01 17:04:29,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:04:29,739 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:29,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 49 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-01 17:04:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 70. [2022-03-01 17:04:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0) internal successors, (138), 69 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 138 transitions. [2022-03-01 17:04:29,745 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 138 transitions. Word has length 15 [2022-03-01 17:04:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:29,745 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 138 transitions. [2022-03-01 17:04:29,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 138 transitions. [2022-03-01 17:04:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:29,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:29,746 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:29,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 17:04:29,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:29,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1232814418, now seen corresponding path program 4 times [2022-03-01 17:04:29,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:29,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192531087] [2022-03-01 17:04:29,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:29,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:29,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:29,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192531087] [2022-03-01 17:04:29,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192531087] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:29,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250506672] [2022-03-01 17:04:29,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:04:29,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:29,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:29,784 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:29,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:04:29,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:04:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:29,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:04:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:29,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:29,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250506672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:29,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:29,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:04:29,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753128612] [2022-03-01 17:04:29,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:29,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:04:29,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:04:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:04:29,878 INFO L87 Difference]: Start difference. First operand 70 states and 138 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:29,958 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2022-03-01 17:04:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:04:29,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:29,959 INFO L225 Difference]: With dead ends: 107 [2022-03-01 17:04:29,959 INFO L226 Difference]: Without dead ends: 107 [2022-03-01 17:04:29,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:29,960 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:29,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 65 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:29,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-01 17:04:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 68. [2022-03-01 17:04:29,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 135 transitions. [2022-03-01 17:04:29,965 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 135 transitions. Word has length 15 [2022-03-01 17:04:29,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:29,965 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 135 transitions. [2022-03-01 17:04:29,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:29,966 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 135 transitions. [2022-03-01 17:04:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:29,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:29,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:29,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:30,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:30,188 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:30,188 INFO L85 PathProgramCache]: Analyzing trace with hash 2136676334, now seen corresponding path program 4 times [2022-03-01 17:04:30,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:30,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289267052] [2022-03-01 17:04:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:30,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:30,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:30,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289267052] [2022-03-01 17:04:30,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289267052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:30,219 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:30,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:04:30,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4382050] [2022-03-01 17:04:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:30,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:30,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:30,220 INFO L87 Difference]: Start difference. First operand 68 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:30,269 INFO L93 Difference]: Finished difference Result 110 states and 212 transitions. [2022-03-01 17:04:30,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:04:30,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:30,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:30,270 INFO L225 Difference]: With dead ends: 110 [2022-03-01 17:04:30,270 INFO L226 Difference]: Without dead ends: 106 [2022-03-01 17:04:30,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:04:30,272 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:30,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 57 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-01 17:04:30,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 68. [2022-03-01 17:04:30,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 134 transitions. [2022-03-01 17:04:30,281 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 134 transitions. Word has length 15 [2022-03-01 17:04:30,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:30,281 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 134 transitions. [2022-03-01 17:04:30,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 134 transitions. [2022-03-01 17:04:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:30,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:30,282 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:30,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-01 17:04:30,282 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:30,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash -347841100, now seen corresponding path program 5 times [2022-03-01 17:04:30,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:30,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151171193] [2022-03-01 17:04:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:30,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:30,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:30,309 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:30,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151171193] [2022-03-01 17:04:30,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151171193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:30,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041791713] [2022-03-01 17:04:30,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:04:30,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:30,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:30,310 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:30,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:04:30,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:30,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:30,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-01 17:04:30,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:30,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:30,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041791713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:30,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:30,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:04:30,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775136619] [2022-03-01 17:04:30,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:30,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:04:30,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:30,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:04:30,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:04:30,419 INFO L87 Difference]: Start difference. First operand 68 states and 134 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:30,498 INFO L93 Difference]: Finished difference Result 127 states and 242 transitions. [2022-03-01 17:04:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:04:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:30,500 INFO L225 Difference]: With dead ends: 127 [2022-03-01 17:04:30,500 INFO L226 Difference]: Without dead ends: 127 [2022-03-01 17:04:30,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:04:30,501 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 55 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:30,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-01 17:04:30,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 68. [2022-03-01 17:04:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.0) internal successors, (134), 67 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 134 transitions. [2022-03-01 17:04:30,512 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 134 transitions. Word has length 15 [2022-03-01 17:04:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:30,512 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 134 transitions. [2022-03-01 17:04:30,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 134 transitions. [2022-03-01 17:04:30,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:30,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:30,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:30,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:30,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:30,735 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:30,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1043193166, now seen corresponding path program 5 times [2022-03-01 17:04:30,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:30,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587040596] [2022-03-01 17:04:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:30,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:30,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:30,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:30,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587040596] [2022-03-01 17:04:30,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587040596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:30,764 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:30,764 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:04:30,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444245594] [2022-03-01 17:04:30,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:30,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:30,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:30,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:30,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:30,765 INFO L87 Difference]: Start difference. First operand 68 states and 134 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:30,835 INFO L93 Difference]: Finished difference Result 129 states and 246 transitions. [2022-03-01 17:04:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:04:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:30,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:30,836 INFO L225 Difference]: With dead ends: 129 [2022-03-01 17:04:30,836 INFO L226 Difference]: Without dead ends: 127 [2022-03-01 17:04:30,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:04:30,837 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:30,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-01 17:04:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 77. [2022-03-01 17:04:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2022-03-01 17:04:30,841 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 15 [2022-03-01 17:04:30,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:30,841 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2022-03-01 17:04:30,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2022-03-01 17:04:30,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:30,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:30,842 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:30,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-01 17:04:30,842 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:30,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:30,842 INFO L85 PathProgramCache]: Analyzing trace with hash 655684526, now seen corresponding path program 6 times [2022-03-01 17:04:30,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:30,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117956783] [2022-03-01 17:04:30,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:30,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:30,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:30,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117956783] [2022-03-01 17:04:30,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117956783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:30,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:30,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:04:30,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994262013] [2022-03-01 17:04:30,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:30,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:30,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:30,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:30,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:30,866 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:30,925 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2022-03-01 17:04:30,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:04:30,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:30,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:30,927 INFO L225 Difference]: With dead ends: 113 [2022-03-01 17:04:30,927 INFO L226 Difference]: Without dead ends: 113 [2022-03-01 17:04:30,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:04:30,927 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:30,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 55 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-01 17:04:30,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 68. [2022-03-01 17:04:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.9850746268656716) internal successors, (133), 67 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 133 transitions. [2022-03-01 17:04:30,930 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 133 transitions. Word has length 15 [2022-03-01 17:04:30,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:30,931 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 133 transitions. [2022-03-01 17:04:30,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 133 transitions. [2022-03-01 17:04:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:04:30,931 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:30,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:30,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-01 17:04:30,932 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:30,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1007411278, now seen corresponding path program 6 times [2022-03-01 17:04:30,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:30,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761312642] [2022-03-01 17:04:30,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:30,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:30,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:30,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761312642] [2022-03-01 17:04:30,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761312642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:04:30,954 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:04:30,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:04:30,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262228298] [2022-03-01 17:04:30,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:04:30,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:30,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:30,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:30,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:30,955 INFO L87 Difference]: Start difference. First operand 68 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:30,999 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2022-03-01 17:04:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:04:30,999 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:04:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:31,000 INFO L225 Difference]: With dead ends: 88 [2022-03-01 17:04:31,000 INFO L226 Difference]: Without dead ends: 85 [2022-03-01 17:04:31,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:04:31,001 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 37 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:31,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 50 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:31,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-01 17:04:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-03-01 17:04:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2022-03-01 17:04:31,003 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 15 [2022-03-01 17:04:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:31,004 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2022-03-01 17:04:31,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2022-03-01 17:04:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:04:31,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:31,004 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:31,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-01 17:04:31,005 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:31,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 941774931, now seen corresponding path program 1 times [2022-03-01 17:04:31,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:31,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758178456] [2022-03-01 17:04:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:31,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:31,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:31,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758178456] [2022-03-01 17:04:31,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758178456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:31,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788916386] [2022-03-01 17:04:31,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:31,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:31,044 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:31,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:04:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:04:31,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:31,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:31,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:31,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788916386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:31,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:31,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-03-01 17:04:31,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422737253] [2022-03-01 17:04:31,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:31,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:04:31,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:31,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:04:31,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:04:31,240 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:31,257 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2022-03-01 17:04:31,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:04:31,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:04:31,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:31,259 INFO L225 Difference]: With dead ends: 152 [2022-03-01 17:04:31,259 INFO L226 Difference]: Without dead ends: 145 [2022-03-01 17:04:31,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:04:31,259 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:31,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 53 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:31,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-01 17:04:31,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2022-03-01 17:04:31,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.066666666666667) internal successors, (248), 120 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 248 transitions. [2022-03-01 17:04:31,263 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 248 transitions. Word has length 18 [2022-03-01 17:04:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:31,263 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 248 transitions. [2022-03-01 17:04:31,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:31,264 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 248 transitions. [2022-03-01 17:04:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:04:31,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:31,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:31,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:31,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-01 17:04:31,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:31,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1874489217, now seen corresponding path program 2 times [2022-03-01 17:04:31,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:31,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875493288] [2022-03-01 17:04:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:31,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:31,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:31,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875493288] [2022-03-01 17:04:31,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875493288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:31,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422655420] [2022-03-01 17:04:31,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:04:31,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:31,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:31,526 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:31,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:04:31,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:31,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:31,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-01 17:04:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:31,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:31,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422655420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:31,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:31,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2022-03-01 17:04:31,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152364531] [2022-03-01 17:04:31,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:31,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:04:31,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:31,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:04:31,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:04:31,698 INFO L87 Difference]: Start difference. First operand 121 states and 248 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:31,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:31,717 INFO L93 Difference]: Finished difference Result 195 states and 393 transitions. [2022-03-01 17:04:31,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:04:31,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:04:31,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:31,719 INFO L225 Difference]: With dead ends: 195 [2022-03-01 17:04:31,719 INFO L226 Difference]: Without dead ends: 188 [2022-03-01 17:04:31,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:04:31,720 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:31,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 55 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-01 17:04:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2022-03-01 17:04:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1225806451612903) internal successors, (329), 155 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:31,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 329 transitions. [2022-03-01 17:04:31,725 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 329 transitions. Word has length 18 [2022-03-01 17:04:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:31,725 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 329 transitions. [2022-03-01 17:04:31,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:31,725 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 329 transitions. [2022-03-01 17:04:31,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:31,726 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:31,726 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:31,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:31,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 17:04:31,936 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:31,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:31,936 INFO L85 PathProgramCache]: Analyzing trace with hash 232065188, now seen corresponding path program 3 times [2022-03-01 17:04:31,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:31,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361191777] [2022-03-01 17:04:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:31,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:31,978 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:31,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361191777] [2022-03-01 17:04:31,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361191777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:31,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042644669] [2022-03-01 17:04:31,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:04:31,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:31,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:32,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:04:32,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:04:32,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:32,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:32,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:32,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:32,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042644669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:32,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:32,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:04:32,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228967568] [2022-03-01 17:04:32,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:32,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:04:32,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:32,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:04:32,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:04:32,117 INFO L87 Difference]: Start difference. First operand 156 states and 329 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:32,243 INFO L93 Difference]: Finished difference Result 303 states and 631 transitions. [2022-03-01 17:04:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:04:32,243 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:32,245 INFO L225 Difference]: With dead ends: 303 [2022-03-01 17:04:32,245 INFO L226 Difference]: Without dead ends: 303 [2022-03-01 17:04:32,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:04:32,246 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:32,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 112 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-01 17:04:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 170. [2022-03-01 17:04:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1420118343195265) internal successors, (362), 169 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:32,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 362 transitions. [2022-03-01 17:04:32,254 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 362 transitions. Word has length 21 [2022-03-01 17:04:32,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:32,255 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 362 transitions. [2022-03-01 17:04:32,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 362 transitions. [2022-03-01 17:04:32,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:32,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:32,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:32,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:32,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:32,478 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:32,478 INFO L85 PathProgramCache]: Analyzing trace with hash 763726802, now seen corresponding path program 4 times [2022-03-01 17:04:32,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:32,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159403590] [2022-03-01 17:04:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:32,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:32,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:32,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159403590] [2022-03-01 17:04:32,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159403590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:32,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678730460] [2022-03-01 17:04:32,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:04:32,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:32,524 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:32,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:04:32,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:32,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:32,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:32,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:04:32,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:32,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:32,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678730460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:32,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:32,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:04:32,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181331362] [2022-03-01 17:04:32,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:32,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:04:32,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:32,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:04:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:04:32,654 INFO L87 Difference]: Start difference. First operand 170 states and 362 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:32,732 INFO L93 Difference]: Finished difference Result 313 states and 651 transitions. [2022-03-01 17:04:32,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:04:32,733 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:32,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:32,734 INFO L225 Difference]: With dead ends: 313 [2022-03-01 17:04:32,734 INFO L226 Difference]: Without dead ends: 296 [2022-03-01 17:04:32,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:04:32,735 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:32,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 92 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:32,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-01 17:04:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 170. [2022-03-01 17:04:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1301775147928996) internal successors, (360), 169 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 360 transitions. [2022-03-01 17:04:32,741 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 360 transitions. Word has length 21 [2022-03-01 17:04:32,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:32,741 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 360 transitions. [2022-03-01 17:04:32,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 360 transitions. [2022-03-01 17:04:32,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:32,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:32,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:32,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:32,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-01 17:04:32,965 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:32,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1396988786, now seen corresponding path program 5 times [2022-03-01 17:04:32,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:32,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463575136] [2022-03-01 17:04:32,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:32,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:33,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:33,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:33,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463575136] [2022-03-01 17:04:33,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463575136] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:33,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116619740] [2022-03-01 17:04:33,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:04:33,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:33,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:33,006 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:33,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:04:33,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:04:33,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:33,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:33,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:33,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116619740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:33,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:33,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:33,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674998729] [2022-03-01 17:04:33,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:33,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:33,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:33,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:33,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:33,150 INFO L87 Difference]: Start difference. First operand 170 states and 360 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:33,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:33,391 INFO L93 Difference]: Finished difference Result 650 states and 1332 transitions. [2022-03-01 17:04:33,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:04:33,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:33,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:33,394 INFO L225 Difference]: With dead ends: 650 [2022-03-01 17:04:33,394 INFO L226 Difference]: Without dead ends: 650 [2022-03-01 17:04:33,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:04:33,395 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 152 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:33,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 121 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-03-01 17:04:33,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 289. [2022-03-01 17:04:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 2.267361111111111) internal successors, (653), 288 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:33,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 653 transitions. [2022-03-01 17:04:33,406 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 653 transitions. Word has length 21 [2022-03-01 17:04:33,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:33,407 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 653 transitions. [2022-03-01 17:04:33,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:33,407 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 653 transitions. [2022-03-01 17:04:33,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:33,408 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:33,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:33,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:33,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 17:04:33,627 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:33,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2092340852, now seen corresponding path program 6 times [2022-03-01 17:04:33,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:33,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819432403] [2022-03-01 17:04:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:33,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:33,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819432403] [2022-03-01 17:04:33,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819432403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:33,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073430004] [2022-03-01 17:04:33,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:04:33,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:33,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:33,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:04:33,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:33,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:04:33,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:33,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:33,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:33,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:33,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073430004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:33,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:33,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:33,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305375247] [2022-03-01 17:04:33,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:33,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:33,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:33,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:33,814 INFO L87 Difference]: Start difference. First operand 289 states and 653 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:34,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:34,015 INFO L93 Difference]: Finished difference Result 660 states and 1419 transitions. [2022-03-01 17:04:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:04:34,015 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:34,018 INFO L225 Difference]: With dead ends: 660 [2022-03-01 17:04:34,018 INFO L226 Difference]: Without dead ends: 656 [2022-03-01 17:04:34,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:04:34,019 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 129 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:34,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 130 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:34,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-03-01 17:04:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 371. [2022-03-01 17:04:34,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.3135135135135134) internal successors, (856), 370 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:34,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 856 transitions. [2022-03-01 17:04:34,047 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 856 transitions. Word has length 21 [2022-03-01 17:04:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:34,047 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 856 transitions. [2022-03-01 17:04:34,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 856 transitions. [2022-03-01 17:04:34,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:34,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:34,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:34,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:34,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:34,271 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:34,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:34,272 INFO L85 PathProgramCache]: Analyzing trace with hash -393463160, now seen corresponding path program 7 times [2022-03-01 17:04:34,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:34,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128276075] [2022-03-01 17:04:34,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:34,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:34,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:34,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:34,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128276075] [2022-03-01 17:04:34,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128276075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:34,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527543660] [2022-03-01 17:04:34,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:04:34,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:34,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:34,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:34,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:04:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:34,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:34,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:34,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:34,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527543660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:34,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:34,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:34,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429431829] [2022-03-01 17:04:34,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:34,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:34,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:34,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:34,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:34,434 INFO L87 Difference]: Start difference. First operand 371 states and 856 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:34,692 INFO L93 Difference]: Finished difference Result 716 states and 1527 transitions. [2022-03-01 17:04:34,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:04:34,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:34,696 INFO L225 Difference]: With dead ends: 716 [2022-03-01 17:04:34,696 INFO L226 Difference]: Without dead ends: 716 [2022-03-01 17:04:34,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:04:34,697 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 109 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:34,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 137 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-01 17:04:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 371. [2022-03-01 17:04:34,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.308108108108108) internal successors, (854), 370 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:34,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 854 transitions. [2022-03-01 17:04:34,709 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 854 transitions. Word has length 21 [2022-03-01 17:04:34,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:34,709 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 854 transitions. [2022-03-01 17:04:34,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 854 transitions. [2022-03-01 17:04:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:34,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:34,710 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:34,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-01 17:04:34,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:34,935 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -41736408, now seen corresponding path program 8 times [2022-03-01 17:04:34,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:34,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285057668] [2022-03-01 17:04:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:34,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:34,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285057668] [2022-03-01 17:04:34,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285057668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:34,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356253248] [2022-03-01 17:04:34,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:04:34,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:34,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:34,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:34,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:04:34,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:34,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:34,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:34,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:35,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:35,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356253248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:35,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:35,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:35,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818499807] [2022-03-01 17:04:35,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:35,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:35,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:35,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:35,108 INFO L87 Difference]: Start difference. First operand 371 states and 854 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:35,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:35,323 INFO L93 Difference]: Finished difference Result 740 states and 1552 transitions. [2022-03-01 17:04:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:04:35,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:35,327 INFO L225 Difference]: With dead ends: 740 [2022-03-01 17:04:35,327 INFO L226 Difference]: Without dead ends: 734 [2022-03-01 17:04:35,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:04:35,328 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 145 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:35,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 115 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:35,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-03-01 17:04:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 374. [2022-03-01 17:04:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.292225201072386) internal successors, (855), 373 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:35,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 855 transitions. [2022-03-01 17:04:35,340 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 855 transitions. Word has length 21 [2022-03-01 17:04:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:35,340 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 855 transitions. [2022-03-01 17:04:35,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:35,341 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 855 transitions. [2022-03-01 17:04:35,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:35,341 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:35,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:35,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:35,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-01 17:04:35,564 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:35,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:35,564 INFO L85 PathProgramCache]: Analyzing trace with hash -548082674, now seen corresponding path program 9 times [2022-03-01 17:04:35,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:35,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660503474] [2022-03-01 17:04:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:35,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:35,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:35,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:35,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660503474] [2022-03-01 17:04:35,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660503474] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:35,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280563349] [2022-03-01 17:04:35,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:04:35,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:35,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:35,609 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:35,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:04:35,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:04:35,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:35,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:35,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:35,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:35,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:35,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280563349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:35,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:35,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:35,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110685856] [2022-03-01 17:04:35,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:35,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:35,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:35,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:35,751 INFO L87 Difference]: Start difference. First operand 374 states and 855 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:35,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:35,906 INFO L93 Difference]: Finished difference Result 623 states and 1353 transitions. [2022-03-01 17:04:35,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:04:35,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:35,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:35,910 INFO L225 Difference]: With dead ends: 623 [2022-03-01 17:04:35,910 INFO L226 Difference]: Without dead ends: 611 [2022-03-01 17:04:35,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:04:35,911 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 79 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:35,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 101 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-03-01 17:04:35,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 378. [2022-03-01 17:04:35,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.2811671087533156) internal successors, (860), 377 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 860 transitions. [2022-03-01 17:04:35,922 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 860 transitions. Word has length 21 [2022-03-01 17:04:35,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:35,922 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 860 transitions. [2022-03-01 17:04:35,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:35,922 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 860 transitions. [2022-03-01 17:04:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:35,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:35,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:35,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:36,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-01 17:04:36,145 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:36,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:36,146 INFO L85 PathProgramCache]: Analyzing trace with hash -876569702, now seen corresponding path program 10 times [2022-03-01 17:04:36,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:36,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100470322] [2022-03-01 17:04:36,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:36,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:36,177 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:36,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100470322] [2022-03-01 17:04:36,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100470322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:36,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100209418] [2022-03-01 17:04:36,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:04:36,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:36,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:36,179 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:36,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:04:36,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:04:36,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:36,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:36,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:36,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:36,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100209418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:36,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:36,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:04:36,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488628552] [2022-03-01 17:04:36,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:36,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:04:36,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:36,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:04:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:04:36,323 INFO L87 Difference]: Start difference. First operand 378 states and 860 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:36,548 INFO L93 Difference]: Finished difference Result 832 states and 1809 transitions. [2022-03-01 17:04:36,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:04:36,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:36,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:36,551 INFO L225 Difference]: With dead ends: 832 [2022-03-01 17:04:36,552 INFO L226 Difference]: Without dead ends: 814 [2022-03-01 17:04:36,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:04:36,552 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 151 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:36,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 117 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-03-01 17:04:36,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 497. [2022-03-01 17:04:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.3245967741935485) internal successors, (1153), 496 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1153 transitions. [2022-03-01 17:04:36,566 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1153 transitions. Word has length 21 [2022-03-01 17:04:36,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:36,567 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1153 transitions. [2022-03-01 17:04:36,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1153 transitions. [2022-03-01 17:04:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:36,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:36,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:36,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:36,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:36,782 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:36,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1989921306, now seen corresponding path program 11 times [2022-03-01 17:04:36,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:36,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796445647] [2022-03-01 17:04:36,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:36,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:36,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:36,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796445647] [2022-03-01 17:04:36,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796445647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:36,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165202799] [2022-03-01 17:04:36,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:04:36,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:36,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:36,838 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:36,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:04:36,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:04:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:36,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:36,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:36,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:36,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:36,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165202799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:36,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:36,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:04:36,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243120251] [2022-03-01 17:04:36,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:36,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:36,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:36,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:36,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:36,985 INFO L87 Difference]: Start difference. First operand 497 states and 1153 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:37,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:37,216 INFO L93 Difference]: Finished difference Result 983 states and 2161 transitions. [2022-03-01 17:04:37,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:04:37,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:37,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:37,220 INFO L225 Difference]: With dead ends: 983 [2022-03-01 17:04:37,220 INFO L226 Difference]: Without dead ends: 983 [2022-03-01 17:04:37,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:04:37,221 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:37,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 135 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-03-01 17:04:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 647. [2022-03-01 17:04:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 646 states have (on average 2.3328173374613) internal successors, (1507), 646 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 1507 transitions. [2022-03-01 17:04:37,240 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 1507 transitions. Word has length 21 [2022-03-01 17:04:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:37,241 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 1507 transitions. [2022-03-01 17:04:37,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 1507 transitions. [2022-03-01 17:04:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:37,242 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:37,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:37,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:37,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:37,464 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:37,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:37,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1787719246, now seen corresponding path program 12 times [2022-03-01 17:04:37,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:37,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864925432] [2022-03-01 17:04:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:37,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:37,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:37,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864925432] [2022-03-01 17:04:37,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864925432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:37,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268292453] [2022-03-01 17:04:37,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:04:37,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:37,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:37,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:37,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:04:37,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:04:37,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:37,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:37,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:37,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268292453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:37,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:37,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:04:37,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004433443] [2022-03-01 17:04:37,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:37,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:04:37,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:04:37,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:04:37,634 INFO L87 Difference]: Start difference. First operand 647 states and 1507 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:37,744 INFO L93 Difference]: Finished difference Result 814 states and 1851 transitions. [2022-03-01 17:04:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:04:37,745 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:37,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:37,748 INFO L225 Difference]: With dead ends: 814 [2022-03-01 17:04:37,748 INFO L226 Difference]: Without dead ends: 814 [2022-03-01 17:04:37,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:04:37,749 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 53 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:37,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 96 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-03-01 17:04:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 661. [2022-03-01 17:04:37,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.3333333333333335) internal successors, (1540), 660 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:37,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1540 transitions. [2022-03-01 17:04:37,765 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1540 transitions. Word has length 21 [2022-03-01 17:04:37,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:37,766 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1540 transitions. [2022-03-01 17:04:37,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:37,766 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1540 transitions. [2022-03-01 17:04:37,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:37,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:37,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:37,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:37,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-01 17:04:37,983 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:37,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash -706887118, now seen corresponding path program 13 times [2022-03-01 17:04:37,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:37,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651481520] [2022-03-01 17:04:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:37,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:38,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:38,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651481520] [2022-03-01 17:04:38,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651481520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:38,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36655658] [2022-03-01 17:04:38,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:04:38,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:38,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:38,019 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:38,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:04:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:38,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:38,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:38,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:38,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:38,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36655658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:38,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:38,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-01 17:04:38,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639922405] [2022-03-01 17:04:38,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:38,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:04:38,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:04:38,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:04:38,163 INFO L87 Difference]: Start difference. First operand 661 states and 1540 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:38,249 INFO L93 Difference]: Finished difference Result 885 states and 2014 transitions. [2022-03-01 17:04:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:04:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:38,253 INFO L225 Difference]: With dead ends: 885 [2022-03-01 17:04:38,253 INFO L226 Difference]: Without dead ends: 875 [2022-03-01 17:04:38,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:04:38,254 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 77 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:38,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 82 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-03-01 17:04:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 661. [2022-03-01 17:04:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.331818181818182) internal successors, (1539), 660 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:38,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1539 transitions. [2022-03-01 17:04:38,284 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1539 transitions. Word has length 21 [2022-03-01 17:04:38,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:38,284 INFO L470 AbstractCegarLoop]: Abstraction has 661 states and 1539 transitions. [2022-03-01 17:04:38,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:38,285 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1539 transitions. [2022-03-01 17:04:38,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:38,286 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:38,286 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:38,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:38,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-01 17:04:38,503 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1794351444, now seen corresponding path program 14 times [2022-03-01 17:04:38,503 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:38,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304517775] [2022-03-01 17:04:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:38,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:38,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:38,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:38,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:38,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304517775] [2022-03-01 17:04:38,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304517775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:38,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401756729] [2022-03-01 17:04:38,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:04:38,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:38,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:38,546 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:38,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:04:38,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:38,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:38,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:38,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:38,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401756729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:38,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:38,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:38,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995915907] [2022-03-01 17:04:38,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:38,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:38,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:38,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:38,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:38,720 INFO L87 Difference]: Start difference. First operand 661 states and 1539 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:38,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:38,890 INFO L93 Difference]: Finished difference Result 869 states and 1945 transitions. [2022-03-01 17:04:38,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:04:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:38,894 INFO L225 Difference]: With dead ends: 869 [2022-03-01 17:04:38,894 INFO L226 Difference]: Without dead ends: 869 [2022-03-01 17:04:38,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:04:38,895 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:38,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 134 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-03-01 17:04:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 721. [2022-03-01 17:04:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 2.3375) internal successors, (1683), 720 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1683 transitions. [2022-03-01 17:04:38,916 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1683 transitions. Word has length 21 [2022-03-01 17:04:38,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:38,916 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 1683 transitions. [2022-03-01 17:04:38,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1683 transitions. [2022-03-01 17:04:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:38,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:38,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:38,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:39,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 17:04:39,123 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1894486254, now seen corresponding path program 15 times [2022-03-01 17:04:39,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:39,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301823928] [2022-03-01 17:04:39,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:39,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:39,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:39,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:39,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301823928] [2022-03-01 17:04:39,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301823928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:39,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795969569] [2022-03-01 17:04:39,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:04:39,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:39,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:39,164 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:39,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:04:39,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:04:39,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:39,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:39,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:39,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:39,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:39,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795969569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:39,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:39,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:39,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913442620] [2022-03-01 17:04:39,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:39,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:39,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:39,311 INFO L87 Difference]: Start difference. First operand 721 states and 1683 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:39,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:39,486 INFO L93 Difference]: Finished difference Result 1013 states and 2270 transitions. [2022-03-01 17:04:39,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:04:39,487 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:39,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:39,491 INFO L225 Difference]: With dead ends: 1013 [2022-03-01 17:04:39,491 INFO L226 Difference]: Without dead ends: 1005 [2022-03-01 17:04:39,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:04:39,492 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 129 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:39,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 95 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-03-01 17:04:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 755. [2022-03-01 17:04:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 755 states, 754 states have (on average 2.3448275862068964) internal successors, (1768), 754 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:39,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 1768 transitions. [2022-03-01 17:04:39,514 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 1768 transitions. Word has length 21 [2022-03-01 17:04:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:39,514 INFO L470 AbstractCegarLoop]: Abstraction has 755 states and 1768 transitions. [2022-03-01 17:04:39,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:39,515 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 1768 transitions. [2022-03-01 17:04:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:39,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:39,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:39,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:39,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:39,731 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash 18272628, now seen corresponding path program 16 times [2022-03-01 17:04:39,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:39,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103487190] [2022-03-01 17:04:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:39,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:39,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103487190] [2022-03-01 17:04:39,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103487190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:39,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967642039] [2022-03-01 17:04:39,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:04:39,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:39,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:39,769 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:39,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:04:39,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:04:39,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:39,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:39,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967642039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:39,930 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:39,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:39,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430196168] [2022-03-01 17:04:39,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:39,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:39,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:39,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:39,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:39,931 INFO L87 Difference]: Start difference. First operand 755 states and 1768 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:40,179 INFO L93 Difference]: Finished difference Result 1127 states and 2483 transitions. [2022-03-01 17:04:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:04:40,179 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:40,184 INFO L225 Difference]: With dead ends: 1127 [2022-03-01 17:04:40,184 INFO L226 Difference]: Without dead ends: 1127 [2022-03-01 17:04:40,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:04:40,188 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 99 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:40,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 130 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:40,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-03-01 17:04:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 814. [2022-03-01 17:04:40,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 813 states have (on average 2.3702337023370235) internal successors, (1927), 813 states have internal predecessors, (1927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:40,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1927 transitions. [2022-03-01 17:04:40,213 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1927 transitions. Word has length 21 [2022-03-01 17:04:40,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:40,213 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1927 transitions. [2022-03-01 17:04:40,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:40,213 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1927 transitions. [2022-03-01 17:04:40,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:40,214 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:40,215 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:40,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:40,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 17:04:40,431 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash -677079438, now seen corresponding path program 17 times [2022-03-01 17:04:40,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:40,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609704509] [2022-03-01 17:04:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:40,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:40,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609704509] [2022-03-01 17:04:40,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609704509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:40,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462074061] [2022-03-01 17:04:40,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:04:40,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:40,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:40,465 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:40,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:04:40,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:40,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:40,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:40,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:40,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462074061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:40,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:40,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:40,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022322456] [2022-03-01 17:04:40,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:40,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:40,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:40,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:40,611 INFO L87 Difference]: Start difference. First operand 814 states and 1927 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:40,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:40,827 INFO L93 Difference]: Finished difference Result 1260 states and 2849 transitions. [2022-03-01 17:04:40,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:04:40,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:40,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:40,832 INFO L225 Difference]: With dead ends: 1260 [2022-03-01 17:04:40,832 INFO L226 Difference]: Without dead ends: 1256 [2022-03-01 17:04:40,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:04:40,833 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 130 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-03-01 17:04:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 912. [2022-03-01 17:04:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.37211855104281) internal successors, (2161), 911 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2161 transitions. [2022-03-01 17:04:40,857 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2161 transitions. Word has length 21 [2022-03-01 17:04:40,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:40,857 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2161 transitions. [2022-03-01 17:04:40,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2161 transitions. [2022-03-01 17:04:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:40,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:40,859 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:40,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:41,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:41,082 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:41,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1021798254, now seen corresponding path program 18 times [2022-03-01 17:04:41,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:41,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928529135] [2022-03-01 17:04:41,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:41,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:41,113 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:41,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928529135] [2022-03-01 17:04:41,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928529135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:41,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818856461] [2022-03-01 17:04:41,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:04:41,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:41,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:41,115 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:41,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:04:41,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:04:41,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:41,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:41,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:41,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:41,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:41,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818856461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:41,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:41,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:41,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158927929] [2022-03-01 17:04:41,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:41,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:41,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:41,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:41,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:41,233 INFO L87 Difference]: Start difference. First operand 912 states and 2161 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:41,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:41,479 INFO L93 Difference]: Finished difference Result 1273 states and 2846 transitions. [2022-03-01 17:04:41,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:04:41,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:41,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:41,484 INFO L225 Difference]: With dead ends: 1273 [2022-03-01 17:04:41,484 INFO L226 Difference]: Without dead ends: 1273 [2022-03-01 17:04:41,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:04:41,485 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 138 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:41,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 134 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-03-01 17:04:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 914. [2022-03-01 17:04:41,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 913 states have (on average 2.36144578313253) internal successors, (2156), 913 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:41,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2156 transitions. [2022-03-01 17:04:41,507 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2156 transitions. Word has length 21 [2022-03-01 17:04:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:41,507 INFO L470 AbstractCegarLoop]: Abstraction has 914 states and 2156 transitions. [2022-03-01 17:04:41,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:41,508 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2156 transitions. [2022-03-01 17:04:41,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:41,509 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:41,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:41,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:41,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:41,731 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1373525006, now seen corresponding path program 19 times [2022-03-01 17:04:41,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:41,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434979627] [2022-03-01 17:04:41,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:41,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:41,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:41,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434979627] [2022-03-01 17:04:41,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434979627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:41,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918992741] [2022-03-01 17:04:41,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:04:41,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:41,770 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:41,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:04:41,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:41,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:41,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:41,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:41,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918992741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:41,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:41,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-01 17:04:41,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522231351] [2022-03-01 17:04:41,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:41,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:41,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:41,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:41,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:41,904 INFO L87 Difference]: Start difference. First operand 914 states and 2156 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:42,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:42,103 INFO L93 Difference]: Finished difference Result 1088 states and 2462 transitions. [2022-03-01 17:04:42,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:04:42,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:42,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:42,108 INFO L225 Difference]: With dead ends: 1088 [2022-03-01 17:04:42,108 INFO L226 Difference]: Without dead ends: 1082 [2022-03-01 17:04:42,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:04:42,110 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:42,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 130 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2022-03-01 17:04:42,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 920. [2022-03-01 17:04:42,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 2.354733405875952) internal successors, (2164), 919 states have internal predecessors, (2164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 2164 transitions. [2022-03-01 17:04:42,133 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 2164 transitions. Word has length 21 [2022-03-01 17:04:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:42,133 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 2164 transitions. [2022-03-01 17:04:42,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 2164 transitions. [2022-03-01 17:04:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:42,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:42,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:42,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:42,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:42,351 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:42,352 INFO L85 PathProgramCache]: Analyzing trace with hash 218758990, now seen corresponding path program 20 times [2022-03-01 17:04:42,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:42,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006352518] [2022-03-01 17:04:42,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:42,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:42,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:42,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006352518] [2022-03-01 17:04:42,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006352518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:42,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921585040] [2022-03-01 17:04:42,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:04:42,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:42,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:42,386 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:42,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:04:42,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:42,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:42,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:42,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:42,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:42,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921585040] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:42,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:42,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:04:42,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603892966] [2022-03-01 17:04:42,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:42,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:04:42,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:42,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:04:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:04:42,537 INFO L87 Difference]: Start difference. First operand 920 states and 2164 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:42,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:42,740 INFO L93 Difference]: Finished difference Result 1291 states and 2913 transitions. [2022-03-01 17:04:42,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:04:42,741 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:42,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:42,745 INFO L225 Difference]: With dead ends: 1291 [2022-03-01 17:04:42,745 INFO L226 Difference]: Without dead ends: 1291 [2022-03-01 17:04:42,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:04:42,746 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:42,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 122 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:42,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-03-01 17:04:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 967. [2022-03-01 17:04:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 2.3509316770186337) internal successors, (2271), 966 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 2271 transitions. [2022-03-01 17:04:42,767 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 2271 transitions. Word has length 21 [2022-03-01 17:04:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:42,768 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 2271 transitions. [2022-03-01 17:04:42,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 2271 transitions. [2022-03-01 17:04:42,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:42,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:42,770 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:42,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 17:04:42,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:42,983 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1411568498, now seen corresponding path program 21 times [2022-03-01 17:04:42,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:42,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372796303] [2022-03-01 17:04:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:42,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:43,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:43,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372796303] [2022-03-01 17:04:43,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372796303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:43,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201006033] [2022-03-01 17:04:43,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:04:43,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:43,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:43,025 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:43,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:04:43,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:04:43,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:43,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:43,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:43,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:43,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:43,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201006033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:43,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:43,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:04:43,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727075576] [2022-03-01 17:04:43,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:43,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:43,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:43,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:43,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:43,163 INFO L87 Difference]: Start difference. First operand 967 states and 2271 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:43,379 INFO L93 Difference]: Finished difference Result 1476 states and 3326 transitions. [2022-03-01 17:04:43,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:04:43,379 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:43,384 INFO L225 Difference]: With dead ends: 1476 [2022-03-01 17:04:43,384 INFO L226 Difference]: Without dead ends: 1476 [2022-03-01 17:04:43,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:04:43,384 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 101 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:43,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 128 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2022-03-01 17:04:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1140. [2022-03-01 17:04:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 2.357330992098332) internal successors, (2685), 1139 states have internal predecessors, (2685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 2685 transitions. [2022-03-01 17:04:43,412 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 2685 transitions. Word has length 21 [2022-03-01 17:04:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:43,412 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 2685 transitions. [2022-03-01 17:04:43,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 2685 transitions. [2022-03-01 17:04:43,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:43,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:43,414 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:43,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:43,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-01 17:04:43,636 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:43,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash -56316120, now seen corresponding path program 22 times [2022-03-01 17:04:43,637 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:43,637 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608827685] [2022-03-01 17:04:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:43,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:43,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608827685] [2022-03-01 17:04:43,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608827685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:43,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339169698] [2022-03-01 17:04:43,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:04:43,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:43,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:43,666 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:43,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:04:43,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:04:43,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:43,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:43,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:43,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339169698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:43,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:43,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 10 [2022-03-01 17:04:43,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869673899] [2022-03-01 17:04:43,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:43,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-01 17:04:43,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:43,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-01 17:04:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-01 17:04:43,784 INFO L87 Difference]: Start difference. First operand 1140 states and 2685 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:43,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:43,960 INFO L93 Difference]: Finished difference Result 1429 states and 3227 transitions. [2022-03-01 17:04:43,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:04:43,960 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:43,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:43,966 INFO L225 Difference]: With dead ends: 1429 [2022-03-01 17:04:43,966 INFO L226 Difference]: Without dead ends: 1423 [2022-03-01 17:04:43,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:04:43,966 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 124 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:43,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 96 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1423 states. [2022-03-01 17:04:43,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1423 to 1088. [2022-03-01 17:04:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 2.340386384544618) internal successors, (2544), 1087 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 2544 transitions. [2022-03-01 17:04:43,988 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 2544 transitions. Word has length 21 [2022-03-01 17:04:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:43,989 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 2544 transitions. [2022-03-01 17:04:43,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 2544 transitions. [2022-03-01 17:04:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-01 17:04:43,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:43,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:44,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:44,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-01 17:04:44,207 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash -562662386, now seen corresponding path program 23 times [2022-03-01 17:04:44,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:44,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629439887] [2022-03-01 17:04:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:44,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:44,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:44,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629439887] [2022-03-01 17:04:44,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629439887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:44,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522556853] [2022-03-01 17:04:44,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:04:44,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:44,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:44,239 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:44,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:04:44,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:04:44,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:44,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:04:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:44,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:44,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522556853] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:44,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:44,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:04:44,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584167467] [2022-03-01 17:04:44,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:44,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:04:44,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:44,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:04:44,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:04:44,381 INFO L87 Difference]: Start difference. First operand 1088 states and 2544 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:44,534 INFO L93 Difference]: Finished difference Result 1433 states and 3263 transitions. [2022-03-01 17:04:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:04:44,534 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-01 17:04:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:44,538 INFO L225 Difference]: With dead ends: 1433 [2022-03-01 17:04:44,538 INFO L226 Difference]: Without dead ends: 1409 [2022-03-01 17:04:44,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:04:44,543 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:44,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 115 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-03-01 17:04:44,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1189. [2022-03-01 17:04:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.3501683501683504) internal successors, (2792), 1188 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:44,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2792 transitions. [2022-03-01 17:04:44,567 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2792 transitions. Word has length 21 [2022-03-01 17:04:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:44,568 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 2792 transitions. [2022-03-01 17:04:44,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:44,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2792 transitions. [2022-03-01 17:04:44,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:04:44,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:44,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:44,592 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:44,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-01 17:04:44,791 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:44,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:44,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1924771297, now seen corresponding path program 24 times [2022-03-01 17:04:44,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:44,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336611897] [2022-03-01 17:04:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:44,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:44,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336611897] [2022-03-01 17:04:44,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336611897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:44,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716969383] [2022-03-01 17:04:44,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:04:44,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:44,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:44,839 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:44,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:04:44,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:04:44,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:44,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:04:44,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:44,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:45,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716969383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:45,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:45,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-01 17:04:45,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473855614] [2022-03-01 17:04:45,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:45,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:45,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:45,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:45,058 INFO L87 Difference]: Start difference. First operand 1189 states and 2792 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:45,100 INFO L93 Difference]: Finished difference Result 1689 states and 3935 transitions. [2022-03-01 17:04:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:04:45,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:04:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:45,104 INFO L225 Difference]: With dead ends: 1689 [2022-03-01 17:04:45,104 INFO L226 Difference]: Without dead ends: 1668 [2022-03-01 17:04:45,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:45,105 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 22 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:45,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-03-01 17:04:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1342. [2022-03-01 17:04:45,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1342 states, 1341 states have (on average 2.354213273676361) internal successors, (3157), 1341 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:45,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1342 states to 1342 states and 3157 transitions. [2022-03-01 17:04:45,140 INFO L78 Accepts]: Start accepts. Automaton has 1342 states and 3157 transitions. Word has length 24 [2022-03-01 17:04:45,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:45,140 INFO L470 AbstractCegarLoop]: Abstraction has 1342 states and 3157 transitions. [2022-03-01 17:04:45,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:45,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1342 states and 3157 transitions. [2022-03-01 17:04:45,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:04:45,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:45,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:45,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:45,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:45,365 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:45,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1268966179, now seen corresponding path program 25 times [2022-03-01 17:04:45,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:45,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030399438] [2022-03-01 17:04:45,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:45,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:45,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:45,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:45,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030399438] [2022-03-01 17:04:45,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030399438] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:45,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131207840] [2022-03-01 17:04:45,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:04:45,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:45,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:45,407 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:45,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:04:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:45,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:04:45,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:45,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:45,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131207840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:45,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:45,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-01 17:04:45,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493315186] [2022-03-01 17:04:45,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:45,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:45,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:45,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:45,607 INFO L87 Difference]: Start difference. First operand 1342 states and 3157 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:45,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:45,644 INFO L93 Difference]: Finished difference Result 2105 states and 4959 transitions. [2022-03-01 17:04:45,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:04:45,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:04:45,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:45,648 INFO L225 Difference]: With dead ends: 2105 [2022-03-01 17:04:45,648 INFO L226 Difference]: Without dead ends: 2078 [2022-03-01 17:04:45,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:45,653 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 21 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:45,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 103 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:45,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2078 states. [2022-03-01 17:04:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2078 to 1674. [2022-03-01 17:04:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.3915122534369395) internal successors, (4001), 1673 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4001 transitions. [2022-03-01 17:04:45,682 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4001 transitions. Word has length 24 [2022-03-01 17:04:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:45,682 INFO L470 AbstractCegarLoop]: Abstraction has 1674 states and 4001 transitions. [2022-03-01 17:04:45,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4001 transitions. [2022-03-01 17:04:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:04:45,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:45,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:45,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:45,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 17:04:45,907 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:45,907 INFO L85 PathProgramCache]: Analyzing trace with hash 739580579, now seen corresponding path program 26 times [2022-03-01 17:04:45,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:45,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067274806] [2022-03-01 17:04:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:45,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:45,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:45,944 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:45,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067274806] [2022-03-01 17:04:45,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067274806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:45,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691170844] [2022-03-01 17:04:45,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:04:45,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:45,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:45,945 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:45,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:04:45,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:45,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:45,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:04:45,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:46,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:46,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:04:46,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691170844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:46,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:46,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-01 17:04:46,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193662687] [2022-03-01 17:04:46,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:46,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:04:46,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:04:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:46,133 INFO L87 Difference]: Start difference. First operand 1674 states and 4001 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:46,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:46,170 INFO L93 Difference]: Finished difference Result 2456 states and 5842 transitions. [2022-03-01 17:04:46,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:04:46,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:04:46,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:46,175 INFO L225 Difference]: With dead ends: 2456 [2022-03-01 17:04:46,175 INFO L226 Difference]: Without dead ends: 2438 [2022-03-01 17:04:46,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:04:46,176 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:46,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 104 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:04:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-03-01 17:04:46,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2316. [2022-03-01 17:04:46,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 2315 states have (on average 2.414686825053996) internal successors, (5590), 2315 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 5590 transitions. [2022-03-01 17:04:46,227 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 5590 transitions. Word has length 24 [2022-03-01 17:04:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:46,227 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 5590 transitions. [2022-03-01 17:04:46,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:46,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 5590 transitions. [2022-03-01 17:04:46,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:46,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:46,232 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:46,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:46,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 17:04:46,453 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:46,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:46,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1065280142, now seen corresponding path program 27 times [2022-03-01 17:04:46,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:46,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160776018] [2022-03-01 17:04:46,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:46,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:46,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:46,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160776018] [2022-03-01 17:04:46,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160776018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:46,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071152902] [2022-03-01 17:04:46,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:04:46,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:46,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:46,500 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:46,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:04:46,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:04:46,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:46,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:46,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:46,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071152902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:46,663 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:46,663 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-01 17:04:46,663 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621796840] [2022-03-01 17:04:46,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:46,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:04:46,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:46,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:04:46,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:04:46,664 INFO L87 Difference]: Start difference. First operand 2316 states and 5590 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:46,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:46,820 INFO L93 Difference]: Finished difference Result 3314 states and 7980 transitions. [2022-03-01 17:04:46,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:04:46,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:46,827 INFO L225 Difference]: With dead ends: 3314 [2022-03-01 17:04:46,827 INFO L226 Difference]: Without dead ends: 3314 [2022-03-01 17:04:46,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:04:46,828 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 76 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:46,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 169 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3314 states. [2022-03-01 17:04:46,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3314 to 2398. [2022-03-01 17:04:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.411764705882353) internal successors, (5781), 2397 states have internal predecessors, (5781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 5781 transitions. [2022-03-01 17:04:46,872 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 5781 transitions. Word has length 27 [2022-03-01 17:04:46,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:46,872 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 5781 transitions. [2022-03-01 17:04:46,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:46,872 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 5781 transitions. [2022-03-01 17:04:46,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:46,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:46,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:46,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 17:04:47,099 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2121442180, now seen corresponding path program 28 times [2022-03-01 17:04:47,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:47,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086636460] [2022-03-01 17:04:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:47,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:47,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:47,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086636460] [2022-03-01 17:04:47,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086636460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:47,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857762677] [2022-03-01 17:04:47,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:04:47,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:47,147 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:47,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:04:47,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:04:47,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:47,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:47,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:47,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:47,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857762677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:47,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:47,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-01 17:04:47,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262630137] [2022-03-01 17:04:47,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:47,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:04:47,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:47,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:04:47,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:04:47,336 INFO L87 Difference]: Start difference. First operand 2398 states and 5781 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:47,454 INFO L93 Difference]: Finished difference Result 3978 states and 9470 transitions. [2022-03-01 17:04:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:04:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:47,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:47,463 INFO L225 Difference]: With dead ends: 3978 [2022-03-01 17:04:47,463 INFO L226 Difference]: Without dead ends: 3952 [2022-03-01 17:04:47,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:04:47,464 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 114 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:47,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 108 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2022-03-01 17:04:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 2398. [2022-03-01 17:04:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2398 states, 2397 states have (on average 2.41093032957864) internal successors, (5779), 2397 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2398 states to 2398 states and 5779 transitions. [2022-03-01 17:04:47,512 INFO L78 Accepts]: Start accepts. Automaton has 2398 states and 5779 transitions. Word has length 27 [2022-03-01 17:04:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:47,513 INFO L470 AbstractCegarLoop]: Abstraction has 2398 states and 5779 transitions. [2022-03-01 17:04:47,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2398 states and 5779 transitions. [2022-03-01 17:04:47,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:47,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:47,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:47,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:47,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:47,740 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:47,740 INFO L85 PathProgramCache]: Analyzing trace with hash -240729226, now seen corresponding path program 29 times [2022-03-01 17:04:47,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:47,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991566620] [2022-03-01 17:04:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:47,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:47,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:47,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991566620] [2022-03-01 17:04:47,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991566620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:47,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865305000] [2022-03-01 17:04:47,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:04:47,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:47,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:47,786 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:47,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:04:47,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:04:47,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:47,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:47,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:47,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865305000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:47,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:47,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:47,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176963889] [2022-03-01 17:04:47,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:47,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:47,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:47,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:47,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:47,991 INFO L87 Difference]: Start difference. First operand 2398 states and 5779 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:48,421 INFO L93 Difference]: Finished difference Result 5235 states and 12267 transitions. [2022-03-01 17:04:48,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:04:48,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:48,432 INFO L225 Difference]: With dead ends: 5235 [2022-03-01 17:04:48,432 INFO L226 Difference]: Without dead ends: 5233 [2022-03-01 17:04:48,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:04:48,433 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 200 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:48,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 227 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:04:48,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5233 states. [2022-03-01 17:04:48,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5233 to 3397. [2022-03-01 17:04:48,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3397 states, 3396 states have (on average 2.4375736160188457) internal successors, (8278), 3396 states have internal predecessors, (8278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:48,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3397 states to 3397 states and 8278 transitions. [2022-03-01 17:04:48,518 INFO L78 Accepts]: Start accepts. Automaton has 3397 states and 8278 transitions. Word has length 27 [2022-03-01 17:04:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:48,518 INFO L470 AbstractCegarLoop]: Abstraction has 3397 states and 8278 transitions. [2022-03-01 17:04:48,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3397 states and 8278 transitions. [2022-03-01 17:04:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:48,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:48,523 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:48,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:48,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-01 17:04:48,743 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash -936081292, now seen corresponding path program 30 times [2022-03-01 17:04:48,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:48,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036828690] [2022-03-01 17:04:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:48,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:48,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:48,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:48,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036828690] [2022-03-01 17:04:48,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036828690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:48,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980079983] [2022-03-01 17:04:48,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:04:48,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:48,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:48,797 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:48,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:04:48,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:04:48,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:48,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:48,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:48,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:48,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980079983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:48,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:48,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:48,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773046594] [2022-03-01 17:04:48,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:48,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:48,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:48,972 INFO L87 Difference]: Start difference. First operand 3397 states and 8278 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:49,311 INFO L93 Difference]: Finished difference Result 4601 states and 10905 transitions. [2022-03-01 17:04:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:04:49,312 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:49,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:49,319 INFO L225 Difference]: With dead ends: 4601 [2022-03-01 17:04:49,320 INFO L226 Difference]: Without dead ends: 4597 [2022-03-01 17:04:49,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:04:49,321 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 152 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:49,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 232 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:04:49,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4597 states. [2022-03-01 17:04:49,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4597 to 3714. [2022-03-01 17:04:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.449232426609211) internal successors, (9094), 3713 states have internal predecessors, (9094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:49,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 9094 transitions. [2022-03-01 17:04:49,416 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 9094 transitions. Word has length 27 [2022-03-01 17:04:49,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:49,416 INFO L470 AbstractCegarLoop]: Abstraction has 3714 states and 9094 transitions. [2022-03-01 17:04:49,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 9094 transitions. [2022-03-01 17:04:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:49,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:49,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:49,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:49,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:49,646 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:49,646 INFO L85 PathProgramCache]: Analyzing trace with hash 762796400, now seen corresponding path program 31 times [2022-03-01 17:04:49,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:49,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850530525] [2022-03-01 17:04:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:49,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:49,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:49,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:49,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850530525] [2022-03-01 17:04:49,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850530525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:49,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370596895] [2022-03-01 17:04:49,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:04:49,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:49,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:49,696 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:49,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:04:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:49,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:49,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:49,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:49,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370596895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:49,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:49,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:49,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705025248] [2022-03-01 17:04:49,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:49,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:49,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:49,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:49,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:49,852 INFO L87 Difference]: Start difference. First operand 3714 states and 9094 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:50,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:50,249 INFO L93 Difference]: Finished difference Result 4766 states and 11235 transitions. [2022-03-01 17:04:50,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:04:50,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:50,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:50,255 INFO L225 Difference]: With dead ends: 4766 [2022-03-01 17:04:50,255 INFO L226 Difference]: Without dead ends: 4766 [2022-03-01 17:04:50,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:04:50,256 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 173 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:50,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 194 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:04:50,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4766 states. [2022-03-01 17:04:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4766 to 3355. [2022-03-01 17:04:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 2.4421586165772213) internal successors, (8191), 3354 states have internal predecessors, (8191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:50,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 8191 transitions. [2022-03-01 17:04:50,323 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 8191 transitions. Word has length 27 [2022-03-01 17:04:50,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:50,323 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 8191 transitions. [2022-03-01 17:04:50,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 8191 transitions. [2022-03-01 17:04:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:50,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:50,328 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:50,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:50,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-01 17:04:50,551 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:50,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:50,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1114523152, now seen corresponding path program 32 times [2022-03-01 17:04:50,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:50,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123896454] [2022-03-01 17:04:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:50,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:50,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:50,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123896454] [2022-03-01 17:04:50,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123896454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:50,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348862473] [2022-03-01 17:04:50,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:04:50,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:50,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:50,590 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:50,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:04:50,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:50,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:50,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:50,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:50,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:50,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348862473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:50,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:50,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:50,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731371469] [2022-03-01 17:04:50,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:50,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:50,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:50,776 INFO L87 Difference]: Start difference. First operand 3355 states and 8191 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:51,094 INFO L93 Difference]: Finished difference Result 5106 states and 12038 transitions. [2022-03-01 17:04:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:04:51,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:51,101 INFO L225 Difference]: With dead ends: 5106 [2022-03-01 17:04:51,101 INFO L226 Difference]: Without dead ends: 5100 [2022-03-01 17:04:51,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:04:51,101 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 224 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:51,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 160 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5100 states. [2022-03-01 17:04:51,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5100 to 2971. [2022-03-01 17:04:51,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2970 states have (on average 2.426262626262626) internal successors, (7206), 2970 states have internal predecessors, (7206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 7206 transitions. [2022-03-01 17:04:51,156 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 7206 transitions. Word has length 27 [2022-03-01 17:04:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:51,156 INFO L470 AbstractCegarLoop]: Abstraction has 2971 states and 7206 transitions. [2022-03-01 17:04:51,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:51,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 7206 transitions. [2022-03-01 17:04:51,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:51,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:51,161 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:51,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-01 17:04:51,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:51,375 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:51,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:51,376 INFO L85 PathProgramCache]: Analyzing trace with hash 608176886, now seen corresponding path program 33 times [2022-03-01 17:04:51,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:51,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109062293] [2022-03-01 17:04:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:51,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:51,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:51,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:51,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109062293] [2022-03-01 17:04:51,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109062293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:51,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220011623] [2022-03-01 17:04:51,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:04:51,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:51,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:51,421 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:51,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:04:51,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:04:51,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:51,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:51,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:51,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:51,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220011623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:51,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:51,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:51,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405318470] [2022-03-01 17:04:51,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:51,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:51,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:51,566 INFO L87 Difference]: Start difference. First operand 2971 states and 7206 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:51,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:51,851 INFO L93 Difference]: Finished difference Result 5036 states and 11882 transitions. [2022-03-01 17:04:51,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:04:51,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:51,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:51,857 INFO L225 Difference]: With dead ends: 5036 [2022-03-01 17:04:51,857 INFO L226 Difference]: Without dead ends: 5012 [2022-03-01 17:04:51,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:04:51,857 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 188 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:51,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 179 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:51,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2022-03-01 17:04:51,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 3115. [2022-03-01 17:04:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3115 states, 3114 states have (on average 2.423892100192678) internal successors, (7548), 3114 states have internal predecessors, (7548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:51,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 7548 transitions. [2022-03-01 17:04:51,925 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 7548 transitions. Word has length 27 [2022-03-01 17:04:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:51,925 INFO L470 AbstractCegarLoop]: Abstraction has 3115 states and 7548 transitions. [2022-03-01 17:04:51,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 7548 transitions. [2022-03-01 17:04:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:51,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:51,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:51,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-01 17:04:52,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-01 17:04:52,143 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:52,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1945454252, now seen corresponding path program 34 times [2022-03-01 17:04:52,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:52,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799358334] [2022-03-01 17:04:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:52,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:52,182 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:52,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:52,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799358334] [2022-03-01 17:04:52,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799358334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:52,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888563434] [2022-03-01 17:04:52,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:04:52,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:52,183 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:52,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:04:52,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:04:52,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:52,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:52,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:52,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:52,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:52,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888563434] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:52,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:52,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:52,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130500798] [2022-03-01 17:04:52,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:52,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:52,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:52,327 INFO L87 Difference]: Start difference. First operand 3115 states and 7548 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:52,552 INFO L93 Difference]: Finished difference Result 4575 states and 10848 transitions. [2022-03-01 17:04:52,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:04:52,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:52,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:52,559 INFO L225 Difference]: With dead ends: 4575 [2022-03-01 17:04:52,560 INFO L226 Difference]: Without dead ends: 4554 [2022-03-01 17:04:52,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:04:52,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 146 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:52,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 131 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:52,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2022-03-01 17:04:52,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3118. [2022-03-01 17:04:52,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 2.421880012832852) internal successors, (7549), 3117 states have internal predecessors, (7549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 7549 transitions. [2022-03-01 17:04:52,629 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 7549 transitions. Word has length 27 [2022-03-01 17:04:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:52,630 INFO L470 AbstractCegarLoop]: Abstraction has 3118 states and 7549 transitions. [2022-03-01 17:04:52,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 7549 transitions. [2022-03-01 17:04:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:52,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:52,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:52,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-01 17:04:52,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 17:04:52,851 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:52,852 INFO L85 PathProgramCache]: Analyzing trace with hash -561233362, now seen corresponding path program 35 times [2022-03-01 17:04:52,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:52,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578796618] [2022-03-01 17:04:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:52,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:52,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:52,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578796618] [2022-03-01 17:04:52,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578796618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:52,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134624658] [2022-03-01 17:04:52,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:04:52,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:52,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:52,892 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:52,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:04:52,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:04:52,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:52,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:52,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:53,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:53,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134624658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:53,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:53,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:04:53,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671503725] [2022-03-01 17:04:53,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:53,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:04:53,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:53,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:04:53,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:04:53,051 INFO L87 Difference]: Start difference. First operand 3118 states and 7549 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:53,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:53,431 INFO L93 Difference]: Finished difference Result 4547 states and 10660 transitions. [2022-03-01 17:04:53,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:04:53,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:53,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:53,439 INFO L225 Difference]: With dead ends: 4547 [2022-03-01 17:04:53,440 INFO L226 Difference]: Without dead ends: 4527 [2022-03-01 17:04:53,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:04:53,441 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 164 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:53,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 238 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:04:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2022-03-01 17:04:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 3177. [2022-03-01 17:04:53,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3177 states, 3176 states have (on average 2.413727959697733) internal successors, (7666), 3176 states have internal predecessors, (7666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3177 states to 3177 states and 7666 transitions. [2022-03-01 17:04:53,517 INFO L78 Accepts]: Start accepts. Automaton has 3177 states and 7666 transitions. Word has length 27 [2022-03-01 17:04:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:53,517 INFO L470 AbstractCegarLoop]: Abstraction has 3177 states and 7666 transitions. [2022-03-01 17:04:53,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3177 states and 7666 transitions. [2022-03-01 17:04:53,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:53,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:53,522 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:53,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:53,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 17:04:53,739 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:53,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:53,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1989709650, now seen corresponding path program 36 times [2022-03-01 17:04:53,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:53,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522849960] [2022-03-01 17:04:53,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:53,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:53,781 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:53,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522849960] [2022-03-01 17:04:53,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522849960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:53,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222601885] [2022-03-01 17:04:53,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:04:53,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:53,782 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:53,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:04:53,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:04:53,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:53,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:53,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:53,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:53,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:53,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:53,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222601885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:53,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:53,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-01 17:04:53,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306834988] [2022-03-01 17:04:53,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:53,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:53,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:53,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:53,928 INFO L87 Difference]: Start difference. First operand 3177 states and 7666 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:54,334 INFO L93 Difference]: Finished difference Result 4685 states and 10870 transitions. [2022-03-01 17:04:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:04:54,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:54,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:54,342 INFO L225 Difference]: With dead ends: 4685 [2022-03-01 17:04:54,342 INFO L226 Difference]: Without dead ends: 4682 [2022-03-01 17:04:54,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:04:54,343 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 149 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:54,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 191 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:04:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4682 states. [2022-03-01 17:04:54,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4682 to 3227. [2022-03-01 17:04:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3227 states, 3226 states have (on average 2.4097954122752636) internal successors, (7774), 3226 states have internal predecessors, (7774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3227 states to 3227 states and 7774 transitions. [2022-03-01 17:04:54,410 INFO L78 Accepts]: Start accepts. Automaton has 3227 states and 7774 transitions. Word has length 27 [2022-03-01 17:04:54,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:54,410 INFO L470 AbstractCegarLoop]: Abstraction has 3227 states and 7774 transitions. [2022-03-01 17:04:54,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 3227 states and 7774 transitions. [2022-03-01 17:04:54,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:54,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:54,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:54,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 17:04:54,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 17:04:54,635 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:54,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:54,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1119091828, now seen corresponding path program 37 times [2022-03-01 17:04:54,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:54,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93461586] [2022-03-01 17:04:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:54,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:54,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:54,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:54,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93461586] [2022-03-01 17:04:54,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93461586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:54,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168366975] [2022-03-01 17:04:54,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:04:54,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:54,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:54,681 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:54,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:04:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:54,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:54,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:54,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:54,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168366975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:54,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:54,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:04:54,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015364197] [2022-03-01 17:04:54,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:54,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:04:54,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:04:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:04:54,855 INFO L87 Difference]: Start difference. First operand 3227 states and 7774 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:55,269 INFO L93 Difference]: Finished difference Result 5003 states and 11695 transitions. [2022-03-01 17:04:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:04:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:55,278 INFO L225 Difference]: With dead ends: 5003 [2022-03-01 17:04:55,278 INFO L226 Difference]: Without dead ends: 4965 [2022-03-01 17:04:55,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:04:55,279 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 194 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:55,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 200 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2022-03-01 17:04:55,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 3763. [2022-03-01 17:04:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.4066985645933014) internal successors, (9054), 3762 states have internal predecessors, (9054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 9054 transitions. [2022-03-01 17:04:55,353 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 9054 transitions. Word has length 27 [2022-03-01 17:04:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:55,353 INFO L470 AbstractCegarLoop]: Abstraction has 3763 states and 9054 transitions. [2022-03-01 17:04:55,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 9054 transitions. [2022-03-01 17:04:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:55,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:55,363 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:55,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:55,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 17:04:55,585 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash -325429520, now seen corresponding path program 38 times [2022-03-01 17:04:55,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:55,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510958703] [2022-03-01 17:04:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:55,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:55,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:55,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510958703] [2022-03-01 17:04:55,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510958703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:55,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620566969] [2022-03-01 17:04:55,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:04:55,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:55,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:55,622 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:55,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:04:55,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:04:55,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:55,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:55,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:55,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:55,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:55,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620566969] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:55,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:55,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-03-01 17:04:55,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881077161] [2022-03-01 17:04:55,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:55,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:55,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:55,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:55,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:55,782 INFO L87 Difference]: Start difference. First operand 3763 states and 9054 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:56,145 INFO L93 Difference]: Finished difference Result 6111 states and 14280 transitions. [2022-03-01 17:04:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:04:56,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:56,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:56,153 INFO L225 Difference]: With dead ends: 6111 [2022-03-01 17:04:56,153 INFO L226 Difference]: Without dead ends: 6108 [2022-03-01 17:04:56,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:04:56,154 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 167 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:56,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 177 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:56,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6108 states. [2022-03-01 17:04:56,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6108 to 4898. [2022-03-01 17:04:56,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4898 states, 4897 states have (on average 2.404533387788442) internal successors, (11775), 4897 states have internal predecessors, (11775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4898 states to 4898 states and 11775 transitions. [2022-03-01 17:04:56,241 INFO L78 Accepts]: Start accepts. Automaton has 4898 states and 11775 transitions. Word has length 27 [2022-03-01 17:04:56,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:56,241 INFO L470 AbstractCegarLoop]: Abstraction has 4898 states and 11775 transitions. [2022-03-01 17:04:56,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4898 states and 11775 transitions. [2022-03-01 17:04:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:56,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:56,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:56,266 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-01 17:04:56,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:56,455 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:56,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:56,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2098122898, now seen corresponding path program 39 times [2022-03-01 17:04:56,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:56,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19981454] [2022-03-01 17:04:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:56,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:56,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:56,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19981454] [2022-03-01 17:04:56,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19981454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:56,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402328014] [2022-03-01 17:04:56,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:04:56,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:56,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:56,501 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:56,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:04:56,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:04:56,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:56,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:56,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:56,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:56,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402328014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:56,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:56,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-01 17:04:56,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873145955] [2022-03-01 17:04:56,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:56,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:04:56,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:56,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:04:56,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:04:56,646 INFO L87 Difference]: Start difference. First operand 4898 states and 11775 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:56,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:56,771 INFO L93 Difference]: Finished difference Result 5703 states and 13619 transitions. [2022-03-01 17:04:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:04:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:56,778 INFO L225 Difference]: With dead ends: 5703 [2022-03-01 17:04:56,778 INFO L226 Difference]: Without dead ends: 5703 [2022-03-01 17:04:56,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:04:56,778 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:56,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 126 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:56,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5703 states. [2022-03-01 17:04:56,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5703 to 4948. [2022-03-01 17:04:56,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4947 states have (on average 2.4042854255104102) internal successors, (11894), 4947 states have internal predecessors, (11894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 11894 transitions. [2022-03-01 17:04:56,841 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 11894 transitions. Word has length 27 [2022-03-01 17:04:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:56,841 INFO L470 AbstractCegarLoop]: Abstraction has 4948 states and 11894 transitions. [2022-03-01 17:04:56,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 11894 transitions. [2022-03-01 17:04:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:56,846 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:56,846 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:56,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 17:04:57,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-01 17:04:57,047 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:57,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1099055662, now seen corresponding path program 40 times [2022-03-01 17:04:57,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:57,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906775067] [2022-03-01 17:04:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:57,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:57,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:57,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906775067] [2022-03-01 17:04:57,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906775067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:57,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406416053] [2022-03-01 17:04:57,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:04:57,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:57,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:57,085 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:57,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:04:57,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:04:57,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:57,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:57,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:57,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:57,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406416053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:57,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:57,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-03-01 17:04:57,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741382540] [2022-03-01 17:04:57,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:57,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:04:57,275 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:57,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:04:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:04:57,275 INFO L87 Difference]: Start difference. First operand 4948 states and 11894 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:57,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:57,401 INFO L93 Difference]: Finished difference Result 6194 states and 14713 transitions. [2022-03-01 17:04:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:04:57,401 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:57,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:57,407 INFO L225 Difference]: With dead ends: 6194 [2022-03-01 17:04:57,408 INFO L226 Difference]: Without dead ends: 6178 [2022-03-01 17:04:57,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:04:57,408 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 110 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:57,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 128 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:57,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6178 states. [2022-03-01 17:04:57,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6178 to 4948. [2022-03-01 17:04:57,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4947 states have (on average 2.404083282797655) internal successors, (11893), 4947 states have internal predecessors, (11893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:57,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 11893 transitions. [2022-03-01 17:04:57,467 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 11893 transitions. Word has length 27 [2022-03-01 17:04:57,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:57,467 INFO L470 AbstractCegarLoop]: Abstraction has 4948 states and 11893 transitions. [2022-03-01 17:04:57,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:57,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 11893 transitions. [2022-03-01 17:04:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:57,472 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:57,472 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:57,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-01 17:04:57,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:57,673 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:57,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:57,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1387633524, now seen corresponding path program 41 times [2022-03-01 17:04:57,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:57,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042331845] [2022-03-01 17:04:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:57,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:57,717 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:57,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042331845] [2022-03-01 17:04:57,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042331845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:57,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084373640] [2022-03-01 17:04:57,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:04:57,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:57,719 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:57,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:04:57,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:04:57,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:57,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:57,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:57,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:57,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:57,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084373640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:57,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:57,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:57,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335417942] [2022-03-01 17:04:57,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:57,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:57,890 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:57,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:57,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:57,890 INFO L87 Difference]: Start difference. First operand 4948 states and 11893 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:58,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:58,088 INFO L93 Difference]: Finished difference Result 5593 states and 13250 transitions. [2022-03-01 17:04:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:04:58,088 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:58,095 INFO L225 Difference]: With dead ends: 5593 [2022-03-01 17:04:58,095 INFO L226 Difference]: Without dead ends: 5593 [2022-03-01 17:04:58,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:04:58,095 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 76 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:58,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 183 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2022-03-01 17:04:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 5023. [2022-03-01 17:04:58,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5023 states, 5022 states have (on average 2.4034249303066506) internal successors, (12070), 5022 states have internal predecessors, (12070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5023 states to 5023 states and 12070 transitions. [2022-03-01 17:04:58,196 INFO L78 Accepts]: Start accepts. Automaton has 5023 states and 12070 transitions. Word has length 27 [2022-03-01 17:04:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:58,196 INFO L470 AbstractCegarLoop]: Abstraction has 5023 states and 12070 transitions. [2022-03-01 17:04:58,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:58,196 INFO L276 IsEmpty]: Start isEmpty. Operand 5023 states and 12070 transitions. [2022-03-01 17:04:58,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:58,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:58,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:58,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 17:04:58,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-01 17:04:58,403 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:58,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:58,403 INFO L85 PathProgramCache]: Analyzing trace with hash 223291890, now seen corresponding path program 42 times [2022-03-01 17:04:58,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:58,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928055234] [2022-03-01 17:04:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:58,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:58,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928055234] [2022-03-01 17:04:58,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928055234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:58,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992300699] [2022-03-01 17:04:58,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:04:58,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:58,445 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:58,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:04:58,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:04:58,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:04:58,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:58,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:58,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:58,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:58,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:58,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992300699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:58,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:58,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:58,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229922752] [2022-03-01 17:04:58,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:58,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:58,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:58,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:58,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:58,610 INFO L87 Difference]: Start difference. First operand 5023 states and 12070 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:58,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:58,829 INFO L93 Difference]: Finished difference Result 6424 states and 15145 transitions. [2022-03-01 17:04:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:04:58,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:58,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:58,837 INFO L225 Difference]: With dead ends: 6424 [2022-03-01 17:04:58,837 INFO L226 Difference]: Without dead ends: 6410 [2022-03-01 17:04:58,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:04:58,838 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 223 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:58,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 112 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:58,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6410 states. [2022-03-01 17:04:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6410 to 5222. [2022-03-01 17:04:58,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5222 states, 5221 states have (on average 2.411798506033327) internal successors, (12592), 5221 states have internal predecessors, (12592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:58,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5222 states to 5222 states and 12592 transitions. [2022-03-01 17:04:58,933 INFO L78 Accepts]: Start accepts. Automaton has 5222 states and 12592 transitions. Word has length 27 [2022-03-01 17:04:58,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:58,933 INFO L470 AbstractCegarLoop]: Abstraction has 5222 states and 12592 transitions. [2022-03-01 17:04:58,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 5222 states and 12592 transitions. [2022-03-01 17:04:58,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:58,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:58,938 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:58,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 17:04:59,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:59,138 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:59,138 INFO L85 PathProgramCache]: Analyzing trace with hash 647549868, now seen corresponding path program 43 times [2022-03-01 17:04:59,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:59,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943248952] [2022-03-01 17:04:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:59,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:59,175 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:04:59,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943248952] [2022-03-01 17:04:59,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943248952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:04:59,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195614892] [2022-03-01 17:04:59,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:04:59,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:59,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:04:59,176 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:04:59,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:04:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:04:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:04:59,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:04:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:59,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:04:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:04:59,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195614892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:04:59,317 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:04:59,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:04:59,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435501592] [2022-03-01 17:04:59,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:04:59,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:04:59,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:04:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:04:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:04:59,318 INFO L87 Difference]: Start difference. First operand 5222 states and 12592 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:59,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:04:59,671 INFO L93 Difference]: Finished difference Result 6346 states and 14943 transitions. [2022-03-01 17:04:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:04:59,672 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:04:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:04:59,679 INFO L225 Difference]: With dead ends: 6346 [2022-03-01 17:04:59,680 INFO L226 Difference]: Without dead ends: 6346 [2022-03-01 17:04:59,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:04:59,680 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 107 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:04:59,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 223 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:04:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6346 states. [2022-03-01 17:04:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6346 to 5473. [2022-03-01 17:04:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 2.4089912280701755) internal successors, (13182), 5472 states have internal predecessors, (13182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:59,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 13182 transitions. [2022-03-01 17:04:59,762 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 13182 transitions. Word has length 27 [2022-03-01 17:04:59,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:04:59,762 INFO L470 AbstractCegarLoop]: Abstraction has 5473 states and 13182 transitions. [2022-03-01 17:04:59,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:04:59,762 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 13182 transitions. [2022-03-01 17:04:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:04:59,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:04:59,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:04:59,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 17:04:59,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:04:59,967 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:04:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:04:59,967 INFO L85 PathProgramCache]: Analyzing trace with hash 41420270, now seen corresponding path program 44 times [2022-03-01 17:04:59,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:04:59,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849011619] [2022-03-01 17:04:59,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:04:59,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:04:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:00,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:00,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849011619] [2022-03-01 17:05:00,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849011619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:00,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717724876] [2022-03-01 17:05:00,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:05:00,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:00,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:00,008 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:00,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:05:00,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:05:00,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:00,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:00,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:00,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:00,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:00,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717724876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:00,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:00,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:05:00,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263089214] [2022-03-01 17:05:00,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:00,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:00,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:00,163 INFO L87 Difference]: Start difference. First operand 5473 states and 13182 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:00,449 INFO L93 Difference]: Finished difference Result 7393 states and 17489 transitions. [2022-03-01 17:05:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:05:00,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:00,458 INFO L225 Difference]: With dead ends: 7393 [2022-03-01 17:05:00,458 INFO L226 Difference]: Without dead ends: 7377 [2022-03-01 17:05:00,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:05:00,459 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 242 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:00,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 145 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7377 states. [2022-03-01 17:05:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7377 to 6211. [2022-03-01 17:05:00,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6211 states, 6210 states have (on average 2.4033816425120773) internal successors, (14925), 6210 states have internal predecessors, (14925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:00,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6211 states to 6211 states and 14925 transitions. [2022-03-01 17:05:00,578 INFO L78 Accepts]: Start accepts. Automaton has 6211 states and 14925 transitions. Word has length 27 [2022-03-01 17:05:00,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:00,579 INFO L470 AbstractCegarLoop]: Abstraction has 6211 states and 14925 transitions. [2022-03-01 17:05:00,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:00,579 INFO L276 IsEmpty]: Start isEmpty. Operand 6211 states and 14925 transitions. [2022-03-01 17:05:00,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:00,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:00,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:00,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 17:05:00,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-01 17:05:00,785 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:00,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1834793356, now seen corresponding path program 45 times [2022-03-01 17:05:00,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:00,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125153963] [2022-03-01 17:05:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:00,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:00,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:00,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125153963] [2022-03-01 17:05:00,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125153963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:00,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300477160] [2022-03-01 17:05:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:05:00,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:00,848 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:00,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:05:00,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:05:00,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:00,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:00,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:00,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300477160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:00,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:01,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:05:01,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318139618] [2022-03-01 17:05:01,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:01,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:01,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:01,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:01,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:01,000 INFO L87 Difference]: Start difference. First operand 6211 states and 14925 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:01,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:01,401 INFO L93 Difference]: Finished difference Result 7527 states and 17693 transitions. [2022-03-01 17:05:01,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:05:01,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:01,410 INFO L225 Difference]: With dead ends: 7527 [2022-03-01 17:05:01,410 INFO L226 Difference]: Without dead ends: 7527 [2022-03-01 17:05:01,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:05:01,411 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 129 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:01,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 249 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:01,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7527 states. [2022-03-01 17:05:01,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7527 to 6569. [2022-03-01 17:05:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 2.4141291108404386) internal successors, (15856), 6568 states have internal predecessors, (15856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 15856 transitions. [2022-03-01 17:05:01,505 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 15856 transitions. Word has length 27 [2022-03-01 17:05:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:01,505 INFO L470 AbstractCegarLoop]: Abstraction has 6569 states and 15856 transitions. [2022-03-01 17:05:01,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 15856 transitions. [2022-03-01 17:05:01,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:01,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:01,511 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:01,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:01,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-01 17:05:01,712 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:01,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1764821874, now seen corresponding path program 46 times [2022-03-01 17:05:01,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:01,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285152356] [2022-03-01 17:05:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:01,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:01,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285152356] [2022-03-01 17:05:01,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285152356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:01,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88315984] [2022-03-01 17:05:01,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:05:01,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:01,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:01,755 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:01,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:05:01,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:05:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:01,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:01,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:01,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88315984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:01,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:01,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:05:01,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609990830] [2022-03-01 17:05:01,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:01,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:01,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:01,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:01,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:01,896 INFO L87 Difference]: Start difference. First operand 6569 states and 15856 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:02,199 INFO L93 Difference]: Finished difference Result 8303 states and 19745 transitions. [2022-03-01 17:05:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:05:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:02,233 INFO L225 Difference]: With dead ends: 8303 [2022-03-01 17:05:02,233 INFO L226 Difference]: Without dead ends: 8297 [2022-03-01 17:05:02,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:05:02,233 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 191 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:02,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 188 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:02,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2022-03-01 17:05:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 6809. [2022-03-01 17:05:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6809 states, 6808 states have (on average 2.4159811985898942) internal successors, (16448), 6808 states have internal predecessors, (16448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6809 states to 6809 states and 16448 transitions. [2022-03-01 17:05:02,326 INFO L78 Accepts]: Start accepts. Automaton has 6809 states and 16448 transitions. Word has length 27 [2022-03-01 17:05:02,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:02,326 INFO L470 AbstractCegarLoop]: Abstraction has 6809 states and 16448 transitions. [2022-03-01 17:05:02,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 6809 states and 16448 transitions. [2022-03-01 17:05:02,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:02,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:02,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:02,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:02,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 17:05:02,534 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:02,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:02,534 INFO L85 PathProgramCache]: Analyzing trace with hash -831267730, now seen corresponding path program 47 times [2022-03-01 17:05:02,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:02,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828007728] [2022-03-01 17:05:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:02,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:02,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:02,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828007728] [2022-03-01 17:05:02,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828007728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:02,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748789917] [2022-03-01 17:05:02,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:05:02,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:02,573 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:02,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:05:02,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:05:02,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:02,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:02,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:02,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:02,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748789917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:02,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:02,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:05:02,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331334247] [2022-03-01 17:05:02,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:02,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:02,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:02,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:02,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:02,709 INFO L87 Difference]: Start difference. First operand 6809 states and 16448 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:03,140 INFO L93 Difference]: Finished difference Result 8107 states and 19029 transitions. [2022-03-01 17:05:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:05:03,141 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:03,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:03,153 INFO L225 Difference]: With dead ends: 8107 [2022-03-01 17:05:03,153 INFO L226 Difference]: Without dead ends: 8104 [2022-03-01 17:05:03,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:05:03,154 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 233 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:03,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 229 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8104 states. [2022-03-01 17:05:03,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8104 to 6516. [2022-03-01 17:05:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6516 states, 6515 states have (on average 2.399846508058327) internal successors, (15635), 6515 states have internal predecessors, (15635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 15635 transitions. [2022-03-01 17:05:03,287 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 15635 transitions. Word has length 27 [2022-03-01 17:05:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:03,287 INFO L470 AbstractCegarLoop]: Abstraction has 6516 states and 15635 transitions. [2022-03-01 17:05:03,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 15635 transitions. [2022-03-01 17:05:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:03,295 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:03,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:03,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-01 17:05:03,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 17:05:03,506 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:03,506 INFO L85 PathProgramCache]: Analyzing trace with hash -479540978, now seen corresponding path program 48 times [2022-03-01 17:05:03,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:03,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901533489] [2022-03-01 17:05:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:03,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:03,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:03,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:03,551 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:03,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901533489] [2022-03-01 17:05:03,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901533489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:03,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122497976] [2022-03-01 17:05:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:05:03,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:03,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:03,553 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:03,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:05:03,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:05:03,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:03,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:03,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:03,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:03,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:03,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122497976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:03,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:03,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-03-01 17:05:03,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767687861] [2022-03-01 17:05:03,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:03,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:03,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:03,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:03,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:03,741 INFO L87 Difference]: Start difference. First operand 6516 states and 15635 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:04,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:04,091 INFO L93 Difference]: Finished difference Result 7119 states and 16802 transitions. [2022-03-01 17:05:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:05:04,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:04,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:04,099 INFO L225 Difference]: With dead ends: 7119 [2022-03-01 17:05:04,099 INFO L226 Difference]: Without dead ends: 7113 [2022-03-01 17:05:04,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:05:04,100 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 117 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:04,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 227 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2022-03-01 17:05:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 5894. [2022-03-01 17:05:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5894 states, 5893 states have (on average 2.400644832852537) internal successors, (14147), 5893 states have internal predecessors, (14147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5894 states to 5894 states and 14147 transitions. [2022-03-01 17:05:04,177 INFO L78 Accepts]: Start accepts. Automaton has 5894 states and 14147 transitions. Word has length 27 [2022-03-01 17:05:04,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:04,178 INFO L470 AbstractCegarLoop]: Abstraction has 5894 states and 14147 transitions. [2022-03-01 17:05:04,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 5894 states and 14147 transitions. [2022-03-01 17:05:04,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:04,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:04,182 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:04,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 17:05:04,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:04,383 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -962748526, now seen corresponding path program 49 times [2022-03-01 17:05:04,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:04,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970328756] [2022-03-01 17:05:04,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:04,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:04,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:04,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:04,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970328756] [2022-03-01 17:05:04,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970328756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:04,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675484127] [2022-03-01 17:05:04,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:05:04,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:04,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:04,427 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:04,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:05:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:04,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:04,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:04,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:04,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675484127] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:04,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:04,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:05:04,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152589166] [2022-03-01 17:05:04,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:04,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:05:04,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:05:04,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:05:04,596 INFO L87 Difference]: Start difference. First operand 5894 states and 14147 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:04,914 INFO L93 Difference]: Finished difference Result 6833 states and 16077 transitions. [2022-03-01 17:05:04,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:05:04,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:04,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:04,942 INFO L225 Difference]: With dead ends: 6833 [2022-03-01 17:05:04,943 INFO L226 Difference]: Without dead ends: 6829 [2022-03-01 17:05:04,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:05:04,943 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 98 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:04,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 212 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2022-03-01 17:05:04,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 5972. [2022-03-01 17:05:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5972 states, 5971 states have (on average 2.400602914084743) internal successors, (14334), 5971 states have internal predecessors, (14334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:05,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5972 states to 5972 states and 14334 transitions. [2022-03-01 17:05:05,007 INFO L78 Accepts]: Start accepts. Automaton has 5972 states and 14334 transitions. Word has length 27 [2022-03-01 17:05:05,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:05,007 INFO L470 AbstractCegarLoop]: Abstraction has 5972 states and 14334 transitions. [2022-03-01 17:05:05,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:05,007 INFO L276 IsEmpty]: Start isEmpty. Operand 5972 states and 14334 transitions. [2022-03-01 17:05:05,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:05,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:05,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:05,028 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-01 17:05:05,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:05,213 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:05,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:05,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1736206930, now seen corresponding path program 50 times [2022-03-01 17:05:05,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:05,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992997363] [2022-03-01 17:05:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:05,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:05,246 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:05,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992997363] [2022-03-01 17:05:05,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992997363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:05,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119179195] [2022-03-01 17:05:05,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:05:05,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:05,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:05,247 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:05,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:05:05,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:05:05,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:05,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:05,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:05,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119179195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:05,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:05,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-01 17:05:05,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001381039] [2022-03-01 17:05:05,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:05,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:05,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:05,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:05,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:05,399 INFO L87 Difference]: Start difference. First operand 5972 states and 14334 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:05,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:05,721 INFO L93 Difference]: Finished difference Result 7209 states and 16949 transitions. [2022-03-01 17:05:05,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:05:05,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:05,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:05,730 INFO L225 Difference]: With dead ends: 7209 [2022-03-01 17:05:05,730 INFO L226 Difference]: Without dead ends: 7207 [2022-03-01 17:05:05,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:05:05,730 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 92 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:05,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 198 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:05,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7207 states. [2022-03-01 17:05:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7207 to 5960. [2022-03-01 17:05:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5960 states, 5959 states have (on average 2.4005705655311296) internal successors, (14305), 5959 states have internal predecessors, (14305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:05,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5960 states to 5960 states and 14305 transitions. [2022-03-01 17:05:05,807 INFO L78 Accepts]: Start accepts. Automaton has 5960 states and 14305 transitions. Word has length 27 [2022-03-01 17:05:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:05,808 INFO L470 AbstractCegarLoop]: Abstraction has 5960 states and 14305 transitions. [2022-03-01 17:05:05,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 5960 states and 14305 transitions. [2022-03-01 17:05:05,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:05,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:05,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:05,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:06,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:06,027 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:06,028 INFO L85 PathProgramCache]: Analyzing trace with hash 105879442, now seen corresponding path program 51 times [2022-03-01 17:05:06,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:06,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989329938] [2022-03-01 17:05:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:06,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:06,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:06,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:06,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:06,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989329938] [2022-03-01 17:05:06,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989329938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:06,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920629330] [2022-03-01 17:05:06,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:05:06,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:06,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:06,061 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:06,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:05:06,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:05:06,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:06,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:06,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:06,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:06,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920629330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:06,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:06,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-01 17:05:06,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424857113] [2022-03-01 17:05:06,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:06,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:06,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:06,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:06,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:06,231 INFO L87 Difference]: Start difference. First operand 5960 states and 14305 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:06,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:06,642 INFO L93 Difference]: Finished difference Result 7671 states and 18014 transitions. [2022-03-01 17:05:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:05:06,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:06,651 INFO L225 Difference]: With dead ends: 7671 [2022-03-01 17:05:06,651 INFO L226 Difference]: Without dead ends: 7671 [2022-03-01 17:05:06,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:05:06,651 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 152 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:06,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 199 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7671 states. [2022-03-01 17:05:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7671 to 6423. [2022-03-01 17:05:06,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6423 states, 6422 states have (on average 2.4040797259420743) internal successors, (15439), 6422 states have internal predecessors, (15439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6423 states to 6423 states and 15439 transitions. [2022-03-01 17:05:06,742 INFO L78 Accepts]: Start accepts. Automaton has 6423 states and 15439 transitions. Word has length 27 [2022-03-01 17:05:06,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:06,742 INFO L470 AbstractCegarLoop]: Abstraction has 6423 states and 15439 transitions. [2022-03-01 17:05:06,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 6423 states and 15439 transitions. [2022-03-01 17:05:06,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:06,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:06,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:06,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:06,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:06,948 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:06,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1461131820, now seen corresponding path program 52 times [2022-03-01 17:05:06,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:06,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164596335] [2022-03-01 17:05:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:06,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:06,984 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:06,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164596335] [2022-03-01 17:05:06,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164596335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:06,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653180977] [2022-03-01 17:05:06,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:05:06,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:06,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:06,986 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:06,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:05:07,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:05:07,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:07,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:07,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:07,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:07,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653180977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:07,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:07,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 13 [2022-03-01 17:05:07,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447212175] [2022-03-01 17:05:07,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:07,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:07,161 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:07,161 INFO L87 Difference]: Start difference. First operand 6423 states and 15439 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:07,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:07,514 INFO L93 Difference]: Finished difference Result 7487 states and 17614 transitions. [2022-03-01 17:05:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:05:07,514 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:07,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:07,522 INFO L225 Difference]: With dead ends: 7487 [2022-03-01 17:05:07,522 INFO L226 Difference]: Without dead ends: 7478 [2022-03-01 17:05:07,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:05:07,523 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 162 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:07,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 204 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7478 states. [2022-03-01 17:05:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7478 to 5692. [2022-03-01 17:05:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.392725355824987) internal successors, (13617), 5691 states have internal predecessors, (13617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 13617 transitions. [2022-03-01 17:05:07,595 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 13617 transitions. Word has length 27 [2022-03-01 17:05:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:07,595 INFO L470 AbstractCegarLoop]: Abstraction has 5692 states and 13617 transitions. [2022-03-01 17:05:07,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 13617 transitions. [2022-03-01 17:05:07,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:07,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:07,621 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:07,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:07,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:07,843 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:07,844 INFO L85 PathProgramCache]: Analyzing trace with hash 954785554, now seen corresponding path program 53 times [2022-03-01 17:05:07,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:07,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802595775] [2022-03-01 17:05:07,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:07,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:07,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:07,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:07,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802595775] [2022-03-01 17:05:07,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802595775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:07,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661236354] [2022-03-01 17:05:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:05:07,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:07,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:07,882 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:07,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:05:07,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:05:07,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:07,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:07,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:07,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:08,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661236354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:08,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:08,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:05:08,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759319286] [2022-03-01 17:05:08,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:08,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:05:08,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:08,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:05:08,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:05:08,040 INFO L87 Difference]: Start difference. First operand 5692 states and 13617 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:08,329 INFO L93 Difference]: Finished difference Result 7031 states and 16507 transitions. [2022-03-01 17:05:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:05:08,329 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:08,337 INFO L225 Difference]: With dead ends: 7031 [2022-03-01 17:05:08,337 INFO L226 Difference]: Without dead ends: 7007 [2022-03-01 17:05:08,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:05:08,338 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 148 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:08,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 179 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7007 states. [2022-03-01 17:05:08,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7007 to 5831. [2022-03-01 17:05:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5831 states, 5830 states have (on average 2.398456260720412) internal successors, (13983), 5830 states have internal predecessors, (13983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:08,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5831 states to 5831 states and 13983 transitions. [2022-03-01 17:05:08,411 INFO L78 Accepts]: Start accepts. Automaton has 5831 states and 13983 transitions. Word has length 27 [2022-03-01 17:05:08,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:08,411 INFO L470 AbstractCegarLoop]: Abstraction has 5831 states and 13983 transitions. [2022-03-01 17:05:08,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:08,411 INFO L276 IsEmpty]: Start isEmpty. Operand 5831 states and 13983 transitions. [2022-03-01 17:05:08,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:08,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:08,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:08,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 17:05:08,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-01 17:05:08,616 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2001501008, now seen corresponding path program 54 times [2022-03-01 17:05:08,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:08,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557828969] [2022-03-01 17:05:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:08,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:08,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557828969] [2022-03-01 17:05:08,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557828969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:08,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079727238] [2022-03-01 17:05:08,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:05:08,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:08,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:08,665 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:08,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:05:08,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:05:08,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:08,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:08,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079727238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:08,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:08,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:05:08,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117389392] [2022-03-01 17:05:08,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:08,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:05:08,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:05:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:05:08,850 INFO L87 Difference]: Start difference. First operand 5831 states and 13983 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:09,250 INFO L93 Difference]: Finished difference Result 7242 states and 16991 transitions. [2022-03-01 17:05:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:05:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:09,258 INFO L225 Difference]: With dead ends: 7242 [2022-03-01 17:05:09,258 INFO L226 Difference]: Without dead ends: 7238 [2022-03-01 17:05:09,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:05:09,259 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 116 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:09,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 226 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2022-03-01 17:05:09,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 6132. [2022-03-01 17:05:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6132 states, 6131 states have (on average 2.391779481324417) internal successors, (14664), 6131 states have internal predecessors, (14664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6132 states to 6132 states and 14664 transitions. [2022-03-01 17:05:09,360 INFO L78 Accepts]: Start accepts. Automaton has 6132 states and 14664 transitions. Word has length 27 [2022-03-01 17:05:09,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:09,360 INFO L470 AbstractCegarLoop]: Abstraction has 6132 states and 14664 transitions. [2022-03-01 17:05:09,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 6132 states and 14664 transitions. [2022-03-01 17:05:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:09,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:09,366 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:09,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 17:05:09,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 17:05:09,578 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash 234495532, now seen corresponding path program 55 times [2022-03-01 17:05:09,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:09,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891994918] [2022-03-01 17:05:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:09,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:09,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:09,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891994918] [2022-03-01 17:05:09,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891994918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:09,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151634528] [2022-03-01 17:05:09,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:05:09,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:09,615 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:09,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:05:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:09,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:09,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:09,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151634528] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:09,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:09,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-03-01 17:05:09,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700664504] [2022-03-01 17:05:09,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:09,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:05:09,813 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:09,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:05:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:05:09,813 INFO L87 Difference]: Start difference. First operand 6132 states and 14664 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:10,269 INFO L93 Difference]: Finished difference Result 8492 states and 19891 transitions. [2022-03-01 17:05:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:05:10,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:10,280 INFO L225 Difference]: With dead ends: 8492 [2022-03-01 17:05:10,280 INFO L226 Difference]: Without dead ends: 8490 [2022-03-01 17:05:10,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:05:10,281 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 117 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:10,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 277 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8490 states. [2022-03-01 17:05:10,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8490 to 7007. [2022-03-01 17:05:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7007 states, 7006 states have (on average 2.396089066514416) internal successors, (16787), 7006 states have internal predecessors, (16787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7007 states to 7007 states and 16787 transitions. [2022-03-01 17:05:10,369 INFO L78 Accepts]: Start accepts. Automaton has 7007 states and 16787 transitions. Word has length 27 [2022-03-01 17:05:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:10,369 INFO L470 AbstractCegarLoop]: Abstraction has 7007 states and 16787 transitions. [2022-03-01 17:05:10,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 7007 states and 16787 transitions. [2022-03-01 17:05:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:10,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:10,375 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:10,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 17:05:10,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-01 17:05:10,579 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:10,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1272293840, now seen corresponding path program 56 times [2022-03-01 17:05:10,579 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:10,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016475352] [2022-03-01 17:05:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:10,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:10,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:10,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016475352] [2022-03-01 17:05:10,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016475352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:10,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248830605] [2022-03-01 17:05:10,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:05:10,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:10,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:10,613 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:10,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:05:10,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:05:10,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:10,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:10,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:10,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:10,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248830605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:10,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:10,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-03-01 17:05:10,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123925575] [2022-03-01 17:05:10,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:10,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:10,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:10,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:10,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:10,768 INFO L87 Difference]: Start difference. First operand 7007 states and 16787 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:11,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:11,160 INFO L93 Difference]: Finished difference Result 9905 states and 23301 transitions. [2022-03-01 17:05:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:05:11,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:11,171 INFO L225 Difference]: With dead ends: 9905 [2022-03-01 17:05:11,172 INFO L226 Difference]: Without dead ends: 9905 [2022-03-01 17:05:11,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:05:11,172 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 130 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:11,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 194 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:11,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9905 states. [2022-03-01 17:05:11,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9905 to 8467. [2022-03-01 17:05:11,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8467 states, 8466 states have (on average 2.394991731632412) internal successors, (20276), 8466 states have internal predecessors, (20276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8467 states to 8467 states and 20276 transitions. [2022-03-01 17:05:11,302 INFO L78 Accepts]: Start accepts. Automaton has 8467 states and 20276 transitions. Word has length 27 [2022-03-01 17:05:11,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:11,302 INFO L470 AbstractCegarLoop]: Abstraction has 8467 states and 20276 transitions. [2022-03-01 17:05:11,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:11,302 INFO L276 IsEmpty]: Start isEmpty. Operand 8467 states and 20276 transitions. [2022-03-01 17:05:11,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:11,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:11,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:11,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-01 17:05:11,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:11,509 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash 82958538, now seen corresponding path program 57 times [2022-03-01 17:05:11,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:11,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657238724] [2022-03-01 17:05:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:11,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:11,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:11,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657238724] [2022-03-01 17:05:11,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657238724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:11,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211196887] [2022-03-01 17:05:11,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:05:11,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:11,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:11,555 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:11,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:05:11,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:05:11,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:11,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:11,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:11,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:11,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211196887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:11,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:11,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 7] total 13 [2022-03-01 17:05:11,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883135958] [2022-03-01 17:05:11,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:11,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:05:11,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:05:11,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:05:11,731 INFO L87 Difference]: Start difference. First operand 8467 states and 20276 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:12,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:12,084 INFO L93 Difference]: Finished difference Result 9754 states and 22974 transitions. [2022-03-01 17:05:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:05:12,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:12,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:12,097 INFO L225 Difference]: With dead ends: 9754 [2022-03-01 17:05:12,097 INFO L226 Difference]: Without dead ends: 9748 [2022-03-01 17:05:12,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:05:12,098 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 145 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:12,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 189 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:12,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9748 states. [2022-03-01 17:05:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9748 to 8287. [2022-03-01 17:05:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8287 states, 8286 states have (on average 2.3880038619357955) internal successors, (19787), 8286 states have internal predecessors, (19787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:12,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8287 states to 8287 states and 19787 transitions. [2022-03-01 17:05:12,207 INFO L78 Accepts]: Start accepts. Automaton has 8287 states and 19787 transitions. Word has length 27 [2022-03-01 17:05:12,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:12,207 INFO L470 AbstractCegarLoop]: Abstraction has 8287 states and 19787 transitions. [2022-03-01 17:05:12,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:12,207 INFO L276 IsEmpty]: Start isEmpty. Operand 8287 states and 19787 transitions. [2022-03-01 17:05:12,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:12,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:12,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:12,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 17:05:12,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 17:05:12,414 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:12,414 INFO L85 PathProgramCache]: Analyzing trace with hash -423387728, now seen corresponding path program 58 times [2022-03-01 17:05:12,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:12,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146635808] [2022-03-01 17:05:12,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:12,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:12,455 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:12,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146635808] [2022-03-01 17:05:12,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146635808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:12,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371983209] [2022-03-01 17:05:12,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:05:12,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:12,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:12,457 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:12,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:05:12,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:05:12,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:12,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:12,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:12,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:12,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371983209] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:12,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:12,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 14 [2022-03-01 17:05:12,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424621909] [2022-03-01 17:05:12,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:12,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:05:12,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:12,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:05:12,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:05:12,647 INFO L87 Difference]: Start difference. First operand 8287 states and 19787 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:13,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:13,024 INFO L93 Difference]: Finished difference Result 9921 states and 23343 transitions. [2022-03-01 17:05:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:05:13,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:13,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:13,035 INFO L225 Difference]: With dead ends: 9921 [2022-03-01 17:05:13,035 INFO L226 Difference]: Without dead ends: 9897 [2022-03-01 17:05:13,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:05:13,036 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 163 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:13,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 171 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:13,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9897 states. [2022-03-01 17:05:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9897 to 8623. [2022-03-01 17:05:13,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8623 states, 8622 states have (on average 2.38842495940617) internal successors, (20593), 8622 states have internal predecessors, (20593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:13,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8623 states to 8623 states and 20593 transitions. [2022-03-01 17:05:13,148 INFO L78 Accepts]: Start accepts. Automaton has 8623 states and 20593 transitions. Word has length 27 [2022-03-01 17:05:13,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:13,148 INFO L470 AbstractCegarLoop]: Abstraction has 8623 states and 20593 transitions. [2022-03-01 17:05:13,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:13,148 INFO L276 IsEmpty]: Start isEmpty. Operand 8623 states and 20593 transitions. [2022-03-01 17:05:13,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-01 17:05:13,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:13,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:13,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-01 17:05:13,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:13,369 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:13,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1317948430, now seen corresponding path program 59 times [2022-03-01 17:05:13,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:13,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412270376] [2022-03-01 17:05:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:13,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:13,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:13,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412270376] [2022-03-01 17:05:13,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412270376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:13,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978416355] [2022-03-01 17:05:13,414 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:05:13,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:13,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:13,416 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:13,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:05:13,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:05:13,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:13,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:05:13,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:13,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:13,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:13,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978416355] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:13,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:13,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:05:13,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058487461] [2022-03-01 17:05:13,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:13,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:05:13,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:13,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:05:13,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:05:13,578 INFO L87 Difference]: Start difference. First operand 8623 states and 20593 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:13,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:13,857 INFO L93 Difference]: Finished difference Result 10314 states and 24325 transitions. [2022-03-01 17:05:13,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:05:13,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-01 17:05:13,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:13,870 INFO L225 Difference]: With dead ends: 10314 [2022-03-01 17:05:13,870 INFO L226 Difference]: Without dead ends: 10272 [2022-03-01 17:05:13,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:05:13,871 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 139 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:13,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 163 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10272 states. [2022-03-01 17:05:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10272 to 9112. [2022-03-01 17:05:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9112 states, 9111 states have (on average 2.388541323674679) internal successors, (21762), 9111 states have internal predecessors, (21762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9112 states to 9112 states and 21762 transitions. [2022-03-01 17:05:13,981 INFO L78 Accepts]: Start accepts. Automaton has 9112 states and 21762 transitions. Word has length 27 [2022-03-01 17:05:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:13,981 INFO L470 AbstractCegarLoop]: Abstraction has 9112 states and 21762 transitions. [2022-03-01 17:05:13,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 9112 states and 21762 transitions. [2022-03-01 17:05:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:05:14,014 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:14,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:14,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 17:05:14,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:14,214 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:14,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1174225325, now seen corresponding path program 60 times [2022-03-01 17:05:14,215 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:14,215 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398567249] [2022-03-01 17:05:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:14,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:14,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:14,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398567249] [2022-03-01 17:05:14,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398567249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:14,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194460290] [2022-03-01 17:05:14,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:05:14,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:14,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:14,270 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:14,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:05:14,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:05:14,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:14,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:05:14,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:14,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:14,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194460290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:14,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:14,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:05:14,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275626964] [2022-03-01 17:05:14,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:14,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:05:14,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:14,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:05:14,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:05:14,479 INFO L87 Difference]: Start difference. First operand 9112 states and 21762 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:14,542 INFO L93 Difference]: Finished difference Result 10611 states and 25338 transitions. [2022-03-01 17:05:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:05:14,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:05:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:14,555 INFO L225 Difference]: With dead ends: 10611 [2022-03-01 17:05:14,556 INFO L226 Difference]: Without dead ends: 10581 [2022-03-01 17:05:14,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:05:14,556 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 31 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:14,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 168 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:05:14,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10581 states. [2022-03-01 17:05:14,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10581 to 9513. [2022-03-01 17:05:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9513 states, 9512 states have (on average 2.390138772077376) internal successors, (22735), 9512 states have internal predecessors, (22735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9513 states to 9513 states and 22735 transitions. [2022-03-01 17:05:14,684 INFO L78 Accepts]: Start accepts. Automaton has 9513 states and 22735 transitions. Word has length 30 [2022-03-01 17:05:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:14,685 INFO L470 AbstractCegarLoop]: Abstraction has 9513 states and 22735 transitions. [2022-03-01 17:05:14,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 9513 states and 22735 transitions. [2022-03-01 17:05:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:05:14,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:14,693 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:14,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-01 17:05:14,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:14,894 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:14,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:14,894 INFO L85 PathProgramCache]: Analyzing trace with hash -643491135, now seen corresponding path program 61 times [2022-03-01 17:05:14,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:14,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309326326] [2022-03-01 17:05:14,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:14,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:14,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:14,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309326326] [2022-03-01 17:05:14,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309326326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:14,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008663106] [2022-03-01 17:05:14,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:05:14,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:14,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:14,939 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:14,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:05:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:14,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:05:14,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:15,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:15,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008663106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:15,134 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:15,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:05:15,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363745139] [2022-03-01 17:05:15,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:15,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:05:15,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:05:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:05:15,135 INFO L87 Difference]: Start difference. First operand 9513 states and 22735 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:15,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:15,204 INFO L93 Difference]: Finished difference Result 12295 states and 29532 transitions. [2022-03-01 17:05:15,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:05:15,204 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:05:15,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:15,220 INFO L225 Difference]: With dead ends: 12295 [2022-03-01 17:05:15,220 INFO L226 Difference]: Without dead ends: 12259 [2022-03-01 17:05:15,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:05:15,221 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:15,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 170 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:05:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12259 states. [2022-03-01 17:05:15,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12259 to 10001. [2022-03-01 17:05:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10001 states, 10000 states have (on average 2.4045) internal successors, (24045), 10000 states have internal predecessors, (24045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10001 states to 10001 states and 24045 transitions. [2022-03-01 17:05:15,410 INFO L78 Accepts]: Start accepts. Automaton has 10001 states and 24045 transitions. Word has length 30 [2022-03-01 17:05:15,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:15,410 INFO L470 AbstractCegarLoop]: Abstraction has 10001 states and 24045 transitions. [2022-03-01 17:05:15,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 10001 states and 24045 transitions. [2022-03-01 17:05:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:05:15,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:15,420 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:15,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-01 17:05:15,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-01 17:05:15,620 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2013310209, now seen corresponding path program 62 times [2022-03-01 17:05:15,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:15,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353982910] [2022-03-01 17:05:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:15,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:15,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:15,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:15,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353982910] [2022-03-01 17:05:15,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353982910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:15,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532225574] [2022-03-01 17:05:15,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:05:15,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:15,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:15,667 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:15,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:05:15,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:05:15,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:15,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:05:15,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:15,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:15,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532225574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:15,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:15,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:05:15,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845842459] [2022-03-01 17:05:15,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:15,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:05:15,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:15,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:05:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:05:15,898 INFO L87 Difference]: Start difference. First operand 10001 states and 24045 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:15,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:15,973 INFO L93 Difference]: Finished difference Result 14193 states and 34282 transitions. [2022-03-01 17:05:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:05:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:05:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:15,993 INFO L225 Difference]: With dead ends: 14193 [2022-03-01 17:05:15,993 INFO L226 Difference]: Without dead ends: 14160 [2022-03-01 17:05:15,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:05:15,993 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 29 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:15,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 171 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:05:16,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14160 states. [2022-03-01 17:05:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14160 to 11674. [2022-03-01 17:05:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11674 states, 11673 states have (on average 2.424226848282361) internal successors, (28298), 11673 states have internal predecessors, (28298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:16,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11674 states to 11674 states and 28298 transitions. [2022-03-01 17:05:16,157 INFO L78 Accepts]: Start accepts. Automaton has 11674 states and 28298 transitions. Word has length 30 [2022-03-01 17:05:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:16,157 INFO L470 AbstractCegarLoop]: Abstraction has 11674 states and 28298 transitions. [2022-03-01 17:05:16,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11674 states and 28298 transitions. [2022-03-01 17:05:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-01 17:05:16,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:16,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:16,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-01 17:05:16,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-01 17:05:16,368 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:16,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:16,368 INFO L85 PathProgramCache]: Analyzing trace with hash 485902849, now seen corresponding path program 63 times [2022-03-01 17:05:16,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:16,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244430810] [2022-03-01 17:05:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:16,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:16,407 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:16,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244430810] [2022-03-01 17:05:16,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244430810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:16,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785906441] [2022-03-01 17:05:16,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:05:16,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:16,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:16,408 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:16,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:05:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:05:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:16,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:05:16,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:16,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:16,605 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:05:16,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785906441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:16,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:16,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-01 17:05:16,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452348872] [2022-03-01 17:05:16,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:16,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:05:16,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:16,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:05:16,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:05:16,606 INFO L87 Difference]: Start difference. First operand 11674 states and 28298 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:16,727 INFO L93 Difference]: Finished difference Result 16136 states and 39070 transitions. [2022-03-01 17:05:16,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:05:16,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-01 17:05:16,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:16,758 INFO L225 Difference]: With dead ends: 16136 [2022-03-01 17:05:16,758 INFO L226 Difference]: Without dead ends: 16112 [2022-03-01 17:05:16,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:05:16,758 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:16,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 171 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:05:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16112 states. [2022-03-01 17:05:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16112 to 15897. [2022-03-01 17:05:17,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15897 states, 15896 states have (on average 2.4291016607951685) internal successors, (38613), 15896 states have internal predecessors, (38613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15897 states to 15897 states and 38613 transitions. [2022-03-01 17:05:17,039 INFO L78 Accepts]: Start accepts. Automaton has 15897 states and 38613 transitions. Word has length 30 [2022-03-01 17:05:17,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:17,040 INFO L470 AbstractCegarLoop]: Abstraction has 15897 states and 38613 transitions. [2022-03-01 17:05:17,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 15897 states and 38613 transitions. [2022-03-01 17:05:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:17,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:17,061 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:17,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-01 17:05:17,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-01 17:05:17,261 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash 547519780, now seen corresponding path program 64 times [2022-03-01 17:05:17,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:17,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286806294] [2022-03-01 17:05:17,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:17,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:17,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:17,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286806294] [2022-03-01 17:05:17,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286806294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:17,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252481010] [2022-03-01 17:05:17,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:05:17,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:17,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:17,326 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:17,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:05:17,346 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:05:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:17,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:17,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:17,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252481010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:17,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:17,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-03-01 17:05:17,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177297063] [2022-03-01 17:05:17,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:17,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:05:17,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:17,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:05:17,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:05:17,506 INFO L87 Difference]: Start difference. First operand 15897 states and 38613 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:17,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:17,764 INFO L93 Difference]: Finished difference Result 20455 states and 49641 transitions. [2022-03-01 17:05:17,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:05:17,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:17,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:17,795 INFO L225 Difference]: With dead ends: 20455 [2022-03-01 17:05:17,795 INFO L226 Difference]: Without dead ends: 20455 [2022-03-01 17:05:17,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:05:17,796 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 116 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:17,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 198 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:17,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20455 states. [2022-03-01 17:05:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20455 to 16120. [2022-03-01 17:05:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16120 states, 16119 states have (on average 2.4278801414479805) internal successors, (39135), 16119 states have internal predecessors, (39135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16120 states to 16120 states and 39135 transitions. [2022-03-01 17:05:18,098 INFO L78 Accepts]: Start accepts. Automaton has 16120 states and 39135 transitions. Word has length 33 [2022-03-01 17:05:18,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:18,098 INFO L470 AbstractCegarLoop]: Abstraction has 16120 states and 39135 transitions. [2022-03-01 17:05:18,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 16120 states and 39135 transitions. [2022-03-01 17:05:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:18,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:18,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:18,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-01 17:05:18,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-01 17:05:18,317 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:18,318 INFO L85 PathProgramCache]: Analyzing trace with hash 235103698, now seen corresponding path program 65 times [2022-03-01 17:05:18,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:18,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803319565] [2022-03-01 17:05:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:18,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:18,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:18,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803319565] [2022-03-01 17:05:18,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803319565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:18,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700484682] [2022-03-01 17:05:18,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:05:18,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:18,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:18,365 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:18,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:05:18,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:05:18,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:18,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:18,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:18,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:18,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700484682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:18,547 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:18,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-03-01 17:05:18,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723029265] [2022-03-01 17:05:18,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:18,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:05:18,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:18,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:05:18,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:05:18,548 INFO L87 Difference]: Start difference. First operand 16120 states and 39135 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:18,744 INFO L93 Difference]: Finished difference Result 24604 states and 59046 transitions. [2022-03-01 17:05:18,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:05:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:18,783 INFO L225 Difference]: With dead ends: 24604 [2022-03-01 17:05:18,783 INFO L226 Difference]: Without dead ends: 24569 [2022-03-01 17:05:18,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:05:18,784 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 124 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:18,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 152 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24569 states. [2022-03-01 17:05:19,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24569 to 16120. [2022-03-01 17:05:19,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16120 states, 16119 states have (on average 2.427756064271977) internal successors, (39133), 16119 states have internal predecessors, (39133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:19,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16120 states to 16120 states and 39133 transitions. [2022-03-01 17:05:19,113 INFO L78 Accepts]: Start accepts. Automaton has 16120 states and 39133 transitions. Word has length 33 [2022-03-01 17:05:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:19,113 INFO L470 AbstractCegarLoop]: Abstraction has 16120 states and 39133 transitions. [2022-03-01 17:05:19,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 16120 states and 39133 transitions. [2022-03-01 17:05:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:19,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:19,131 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:19,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:19,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:19,331 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash 666938062, now seen corresponding path program 66 times [2022-03-01 17:05:19,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:19,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302701934] [2022-03-01 17:05:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:19,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:19,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302701934] [2022-03-01 17:05:19,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302701934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:19,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274057683] [2022-03-01 17:05:19,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:05:19,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:19,396 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:19,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:05:19,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:05:19,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:19,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:19,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274057683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:19,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:19,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:19,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230955881] [2022-03-01 17:05:19,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:19,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:19,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:19,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:19,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:19,593 INFO L87 Difference]: Start difference. First operand 16120 states and 39133 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:20,361 INFO L93 Difference]: Finished difference Result 29053 states and 69475 transitions. [2022-03-01 17:05:20,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 17:05:20,361 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:20,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:20,410 INFO L225 Difference]: With dead ends: 29053 [2022-03-01 17:05:20,410 INFO L226 Difference]: Without dead ends: 29043 [2022-03-01 17:05:20,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1803 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 17:05:20,412 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 337 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:20,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 259 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29043 states. [2022-03-01 17:05:20,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29043 to 20414. [2022-03-01 17:05:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20414 states, 20413 states have (on average 2.4425121246264636) internal successors, (49859), 20413 states have internal predecessors, (49859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20414 states to 20414 states and 49859 transitions. [2022-03-01 17:05:21,077 INFO L78 Accepts]: Start accepts. Automaton has 20414 states and 49859 transitions. Word has length 33 [2022-03-01 17:05:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:21,078 INFO L470 AbstractCegarLoop]: Abstraction has 20414 states and 49859 transitions. [2022-03-01 17:05:21,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:21,078 INFO L276 IsEmpty]: Start isEmpty. Operand 20414 states and 49859 transitions. [2022-03-01 17:05:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:21,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:21,096 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:21,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 17:05:21,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:21,296 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash -28414004, now seen corresponding path program 67 times [2022-03-01 17:05:21,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:21,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910889818] [2022-03-01 17:05:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:21,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:21,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910889818] [2022-03-01 17:05:21,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910889818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:21,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321082110] [2022-03-01 17:05:21,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:05:21,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:21,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:21,351 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:21,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:05:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:21,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:21,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:21,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:21,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:21,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321082110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:21,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:21,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:21,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046779531] [2022-03-01 17:05:21,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:21,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:21,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:21,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:21,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:21,522 INFO L87 Difference]: Start difference. First operand 20414 states and 49859 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:22,048 INFO L93 Difference]: Finished difference Result 23900 states and 57743 transitions. [2022-03-01 17:05:22,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:05:22,049 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:22,088 INFO L225 Difference]: With dead ends: 23900 [2022-03-01 17:05:22,089 INFO L226 Difference]: Without dead ends: 23896 [2022-03-01 17:05:22,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:05:22,089 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 231 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:22,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 257 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:22,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23896 states. [2022-03-01 17:05:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23896 to 21251. [2022-03-01 17:05:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21251 states, 21250 states have (on average 2.448) internal successors, (52020), 21250 states have internal predecessors, (52020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21251 states to 21251 states and 52020 transitions. [2022-03-01 17:05:22,533 INFO L78 Accepts]: Start accepts. Automaton has 21251 states and 52020 transitions. Word has length 33 [2022-03-01 17:05:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:22,533 INFO L470 AbstractCegarLoop]: Abstraction has 21251 states and 52020 transitions. [2022-03-01 17:05:22,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 21251 states and 52020 transitions. [2022-03-01 17:05:22,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:22,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:22,553 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:22,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 17:05:22,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-01 17:05:22,754 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1670463688, now seen corresponding path program 68 times [2022-03-01 17:05:22,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:22,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460566008] [2022-03-01 17:05:22,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:22,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:22,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:22,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460566008] [2022-03-01 17:05:22,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460566008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:22,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651631950] [2022-03-01 17:05:22,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:05:22,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:22,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:22,816 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:22,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:05:22,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:05:22,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:22,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:22,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:22,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:23,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651631950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:23,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:23,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:23,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12293477] [2022-03-01 17:05:23,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:23,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:23,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:23,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:23,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:23,015 INFO L87 Difference]: Start difference. First operand 21251 states and 52020 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:23,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:23,722 INFO L93 Difference]: Finished difference Result 24375 states and 58715 transitions. [2022-03-01 17:05:23,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:05:23,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:23,760 INFO L225 Difference]: With dead ends: 24375 [2022-03-01 17:05:23,761 INFO L226 Difference]: Without dead ends: 24375 [2022-03-01 17:05:23,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:05:23,762 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 175 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:23,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 332 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:23,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24375 states. [2022-03-01 17:05:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24375 to 19878. [2022-03-01 17:05:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19878 states, 19877 states have (on average 2.442923982492328) internal successors, (48558), 19877 states have internal predecessors, (48558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:24,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19878 states to 19878 states and 48558 transitions. [2022-03-01 17:05:24,190 INFO L78 Accepts]: Start accepts. Automaton has 19878 states and 48558 transitions. Word has length 33 [2022-03-01 17:05:24,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:24,190 INFO L470 AbstractCegarLoop]: Abstraction has 19878 states and 48558 transitions. [2022-03-01 17:05:24,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:24,191 INFO L276 IsEmpty]: Start isEmpty. Operand 19878 states and 48558 transitions. [2022-03-01 17:05:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:24,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:24,210 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:24,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-01 17:05:24,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:24,410 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2022190440, now seen corresponding path program 69 times [2022-03-01 17:05:24,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:24,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91152040] [2022-03-01 17:05:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:24,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:24,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:24,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91152040] [2022-03-01 17:05:24,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91152040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:24,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481998309] [2022-03-01 17:05:24,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:05:24,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:24,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:24,557 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:24,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:05:24,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:05:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:24,683 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:24,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:24,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481998309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:24,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:24,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:24,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833745220] [2022-03-01 17:05:24,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:24,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:24,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:24,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:24,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:24,741 INFO L87 Difference]: Start difference. First operand 19878 states and 48558 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:25,353 INFO L93 Difference]: Finished difference Result 28185 states and 67521 transitions. [2022-03-01 17:05:25,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:05:25,353 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:25,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:25,400 INFO L225 Difference]: With dead ends: 28185 [2022-03-01 17:05:25,400 INFO L226 Difference]: Without dead ends: 28179 [2022-03-01 17:05:25,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:05:25,400 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 321 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:25,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 216 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28179 states. [2022-03-01 17:05:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28179 to 17968. [2022-03-01 17:05:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.4288974230533755) internal successors, (43640), 17967 states have internal predecessors, (43640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 43640 transitions. [2022-03-01 17:05:25,810 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 43640 transitions. Word has length 33 [2022-03-01 17:05:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:25,810 INFO L470 AbstractCegarLoop]: Abstraction has 17968 states and 43640 transitions. [2022-03-01 17:05:25,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:25,811 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 43640 transitions. [2022-03-01 17:05:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:25,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:25,828 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:25,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 17:05:26,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:26,029 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:26,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1515844174, now seen corresponding path program 70 times [2022-03-01 17:05:26,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:26,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257210698] [2022-03-01 17:05:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:26,079 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:26,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257210698] [2022-03-01 17:05:26,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257210698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:26,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006643] [2022-03-01 17:05:26,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:05:26,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:26,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:26,081 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:26,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:05:26,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:05:26,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:26,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:26,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:26,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:26,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:26,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:26,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:26,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144625104] [2022-03-01 17:05:26,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:26,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:26,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:26,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:26,263 INFO L87 Difference]: Start difference. First operand 17968 states and 43640 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:26,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:26,766 INFO L93 Difference]: Finished difference Result 26897 states and 64354 transitions. [2022-03-01 17:05:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:05:26,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:26,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:26,810 INFO L225 Difference]: With dead ends: 26897 [2022-03-01 17:05:26,810 INFO L226 Difference]: Without dead ends: 26873 [2022-03-01 17:05:26,810 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:05:26,811 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 312 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:26,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 203 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26873 states. [2022-03-01 17:05:27,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26873 to 18288. [2022-03-01 17:05:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18288 states, 18287 states have (on average 2.4269699786733745) internal successors, (44382), 18287 states have internal predecessors, (44382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18288 states to 18288 states and 44382 transitions. [2022-03-01 17:05:27,302 INFO L78 Accepts]: Start accepts. Automaton has 18288 states and 44382 transitions. Word has length 33 [2022-03-01 17:05:27,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:27,303 INFO L470 AbstractCegarLoop]: Abstraction has 18288 states and 44382 transitions. [2022-03-01 17:05:27,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 18288 states and 44382 transitions. [2022-03-01 17:05:27,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:27,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:27,321 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:27,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:27,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:27,521 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:27,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1037786964, now seen corresponding path program 71 times [2022-03-01 17:05:27,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:27,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158534694] [2022-03-01 17:05:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:27,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:27,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:27,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158534694] [2022-03-01 17:05:27,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158534694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:27,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967321690] [2022-03-01 17:05:27,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:05:27,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:27,585 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:27,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:05:27,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:05:27,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:27,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:27,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:27,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:27,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967321690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:27,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:27,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:27,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713462296] [2022-03-01 17:05:27,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:27,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:27,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:27,798 INFO L87 Difference]: Start difference. First operand 18288 states and 44382 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:28,338 INFO L93 Difference]: Finished difference Result 27620 states and 66056 transitions. [2022-03-01 17:05:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:05:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:28,383 INFO L225 Difference]: With dead ends: 27620 [2022-03-01 17:05:28,383 INFO L226 Difference]: Without dead ends: 27578 [2022-03-01 17:05:28,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:05:28,384 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 296 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:28,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 193 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:28,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27578 states. [2022-03-01 17:05:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27578 to 18474. [2022-03-01 17:05:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18474 states, 18473 states have (on average 2.426081307854707) internal successors, (44817), 18473 states have internal predecessors, (44817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:28,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18474 states to 18474 states and 44817 transitions. [2022-03-01 17:05:28,753 INFO L78 Accepts]: Start accepts. Automaton has 18474 states and 44817 transitions. Word has length 33 [2022-03-01 17:05:28,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:28,753 INFO L470 AbstractCegarLoop]: Abstraction has 18474 states and 44817 transitions. [2022-03-01 17:05:28,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:28,753 INFO L276 IsEmpty]: Start isEmpty. Operand 18474 states and 44817 transitions. [2022-03-01 17:05:28,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:28,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:28,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:28,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 17:05:28,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-01 17:05:28,971 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:28,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:28,971 INFO L85 PathProgramCache]: Analyzing trace with hash 492694926, now seen corresponding path program 72 times [2022-03-01 17:05:28,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:28,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209743991] [2022-03-01 17:05:28,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:28,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:29,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:29,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209743991] [2022-03-01 17:05:29,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209743991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:29,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669317445] [2022-03-01 17:05:29,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:05:29,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:29,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:29,029 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:29,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:05:29,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:05:29,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:29,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:29,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:29,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669317445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:29,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:29,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:29,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96120723] [2022-03-01 17:05:29,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:29,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:29,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:29,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:29,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:29,248 INFO L87 Difference]: Start difference. First operand 18474 states and 44817 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:29,715 INFO L93 Difference]: Finished difference Result 25842 states and 61833 transitions. [2022-03-01 17:05:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:05:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:29,756 INFO L225 Difference]: With dead ends: 25842 [2022-03-01 17:05:29,756 INFO L226 Difference]: Without dead ends: 25812 [2022-03-01 17:05:29,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:05:29,756 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 264 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:29,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 118 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25812 states. [2022-03-01 17:05:30,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25812 to 18474. [2022-03-01 17:05:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18474 states, 18473 states have (on average 2.425431711145997) internal successors, (44805), 18473 states have internal predecessors, (44805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18474 states to 18474 states and 44805 transitions. [2022-03-01 17:05:30,164 INFO L78 Accepts]: Start accepts. Automaton has 18474 states and 44805 transitions. Word has length 33 [2022-03-01 17:05:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:30,164 INFO L470 AbstractCegarLoop]: Abstraction has 18474 states and 44805 transitions. [2022-03-01 17:05:30,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 18474 states and 44805 transitions. [2022-03-01 17:05:30,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:30,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:30,182 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:30,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-01 17:05:30,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:30,383 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:30,383 INFO L85 PathProgramCache]: Analyzing trace with hash 947024474, now seen corresponding path program 73 times [2022-03-01 17:05:30,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:30,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392173001] [2022-03-01 17:05:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:30,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:30,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:30,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392173001] [2022-03-01 17:05:30,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392173001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:30,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136744024] [2022-03-01 17:05:30,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:05:30,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:30,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:30,434 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:30,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:05:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:30,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:30,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:30,570 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:30,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:30,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136744024] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:30,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:30,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-01 17:05:30,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558642713] [2022-03-01 17:05:30,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:30,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:05:30,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:05:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:05:30,627 INFO L87 Difference]: Start difference. First operand 18474 states and 44805 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:31,332 INFO L93 Difference]: Finished difference Result 22066 states and 52977 transitions. [2022-03-01 17:05:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-01 17:05:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:31,363 INFO L225 Difference]: With dead ends: 22066 [2022-03-01 17:05:31,363 INFO L226 Difference]: Without dead ends: 22046 [2022-03-01 17:05:31,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:05:31,364 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 255 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:31,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 292 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:31,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22046 states. [2022-03-01 17:05:31,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22046 to 19236. [2022-03-01 17:05:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19236 states, 19235 states have (on average 2.4252144528203794) internal successors, (46649), 19235 states have internal predecessors, (46649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19236 states to 19236 states and 46649 transitions. [2022-03-01 17:05:31,759 INFO L78 Accepts]: Start accepts. Automaton has 19236 states and 46649 transitions. Word has length 33 [2022-03-01 17:05:31,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:31,759 INFO L470 AbstractCegarLoop]: Abstraction has 19236 states and 46649 transitions. [2022-03-01 17:05:31,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:31,759 INFO L276 IsEmpty]: Start isEmpty. Operand 19236 states and 46649 transitions. [2022-03-01 17:05:31,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:31,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:31,778 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:31,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 17:05:31,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:31,978 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash -481451814, now seen corresponding path program 74 times [2022-03-01 17:05:31,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:31,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349852817] [2022-03-01 17:05:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:32,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:32,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349852817] [2022-03-01 17:05:32,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349852817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:32,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244888582] [2022-03-01 17:05:32,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:05:32,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:32,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:32,031 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:32,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:05:32,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:05:32,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:32,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:32,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:32,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244888582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:32,214 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:32,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-01 17:05:32,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814493747] [2022-03-01 17:05:32,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:32,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:32,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:32,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:32,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:32,215 INFO L87 Difference]: Start difference. First operand 19236 states and 46649 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:32,898 INFO L93 Difference]: Finished difference Result 22673 states and 54112 transitions. [2022-03-01 17:05:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:05:32,898 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:32,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:32,933 INFO L225 Difference]: With dead ends: 22673 [2022-03-01 17:05:32,934 INFO L226 Difference]: Without dead ends: 22661 [2022-03-01 17:05:32,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:05:32,935 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 218 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:32,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 319 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22661 states. [2022-03-01 17:05:33,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22661 to 17519. [2022-03-01 17:05:33,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17519 states, 17518 states have (on average 2.4243635118164173) internal successors, (42470), 17518 states have internal predecessors, (42470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:33,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 42470 transitions. [2022-03-01 17:05:33,349 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 42470 transitions. Word has length 33 [2022-03-01 17:05:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:33,350 INFO L470 AbstractCegarLoop]: Abstraction has 17519 states and 42470 transitions. [2022-03-01 17:05:33,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:33,350 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 42470 transitions. [2022-03-01 17:05:33,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:33,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:33,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:33,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-01 17:05:33,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:33,569 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1329241080, now seen corresponding path program 75 times [2022-03-01 17:05:33,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:33,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811435039] [2022-03-01 17:05:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:33,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:33,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811435039] [2022-03-01 17:05:33,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811435039] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:33,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741612240] [2022-03-01 17:05:33,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:05:33,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:33,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:33,728 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:33,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:05:33,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-01 17:05:33,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:33,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:33,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741612240] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:33,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:33,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:05:33,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049479066] [2022-03-01 17:05:33,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:33,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:05:33,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:33,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:05:33,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:05:33,943 INFO L87 Difference]: Start difference. First operand 17519 states and 42470 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:34,561 INFO L93 Difference]: Finished difference Result 22452 states and 53652 transitions. [2022-03-01 17:05:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:05:34,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:34,598 INFO L225 Difference]: With dead ends: 22452 [2022-03-01 17:05:34,598 INFO L226 Difference]: Without dead ends: 22406 [2022-03-01 17:05:34,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 891 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:05:34,599 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 268 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:34,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 271 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22406 states. [2022-03-01 17:05:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22406 to 18251. [2022-03-01 17:05:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18251 states, 18250 states have (on average 2.4206575342465753) internal successors, (44177), 18250 states have internal predecessors, (44177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18251 states to 18251 states and 44177 transitions. [2022-03-01 17:05:35,015 INFO L78 Accepts]: Start accepts. Automaton has 18251 states and 44177 transitions. Word has length 33 [2022-03-01 17:05:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:35,015 INFO L470 AbstractCegarLoop]: Abstraction has 18251 states and 44177 transitions. [2022-03-01 17:05:35,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 18251 states and 44177 transitions. [2022-03-01 17:05:35,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:35,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:35,034 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:35,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-01 17:05:35,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-01 17:05:35,234 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:35,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:35,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1521204868, now seen corresponding path program 76 times [2022-03-01 17:05:35,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:35,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870513316] [2022-03-01 17:05:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:35,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:35,274 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:35,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870513316] [2022-03-01 17:05:35,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870513316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:35,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170561466] [2022-03-01 17:05:35,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:05:35,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:35,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:35,276 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:35,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:05:35,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:05:35,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:35,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:35,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:35,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:35,488 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:35,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170561466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:35,488 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:35,488 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-01 17:05:35,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008157714] [2022-03-01 17:05:35,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:35,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:35,489 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:35,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:35,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:35,489 INFO L87 Difference]: Start difference. First operand 18251 states and 44177 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:36,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:36,273 INFO L93 Difference]: Finished difference Result 23972 states and 57036 transitions. [2022-03-01 17:05:36,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:05:36,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:36,313 INFO L225 Difference]: With dead ends: 23972 [2022-03-01 17:05:36,313 INFO L226 Difference]: Without dead ends: 23957 [2022-03-01 17:05:36,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:05:36,313 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 266 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:36,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 218 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:36,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23957 states. [2022-03-01 17:05:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23957 to 19212. [2022-03-01 17:05:36,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19212 states, 19211 states have (on average 2.422882723439696) internal successors, (46546), 19211 states have internal predecessors, (46546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19212 states to 19212 states and 46546 transitions. [2022-03-01 17:05:36,738 INFO L78 Accepts]: Start accepts. Automaton has 19212 states and 46546 transitions. Word has length 33 [2022-03-01 17:05:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:36,738 INFO L470 AbstractCegarLoop]: Abstraction has 19212 states and 46546 transitions. [2022-03-01 17:05:36,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 19212 states and 46546 transitions. [2022-03-01 17:05:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:36,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:36,757 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:36,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 17:05:36,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-01 17:05:36,957 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:36,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:36,958 INFO L85 PathProgramCache]: Analyzing trace with hash -317723750, now seen corresponding path program 77 times [2022-03-01 17:05:36,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:36,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104809688] [2022-03-01 17:05:36,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:36,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:37,017 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:37,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:37,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104809688] [2022-03-01 17:05:37,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104809688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:37,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667570092] [2022-03-01 17:05:37,018 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:05:37,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:37,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:37,019 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:37,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:05:37,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:05:37,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:37,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:37,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:37,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:37,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:37,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667570092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:37,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:37,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:05:37,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762992311] [2022-03-01 17:05:37,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:37,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:05:37,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:05:37,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:05:37,278 INFO L87 Difference]: Start difference. First operand 19212 states and 46546 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:37,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:37,921 INFO L93 Difference]: Finished difference Result 24404 states and 58210 transitions. [2022-03-01 17:05:37,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:05:37,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:37,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:37,960 INFO L225 Difference]: With dead ends: 24404 [2022-03-01 17:05:37,960 INFO L226 Difference]: Without dead ends: 24340 [2022-03-01 17:05:37,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1034, Invalid=2748, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:05:37,961 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 297 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:37,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 275 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24340 states. [2022-03-01 17:05:38,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24340 to 20582. [2022-03-01 17:05:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20582 states, 20581 states have (on average 2.418395607599242) internal successors, (49773), 20581 states have internal predecessors, (49773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:38,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20582 states to 20582 states and 49773 transitions. [2022-03-01 17:05:38,395 INFO L78 Accepts]: Start accepts. Automaton has 20582 states and 49773 transitions. Word has length 33 [2022-03-01 17:05:38,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:38,395 INFO L470 AbstractCegarLoop]: Abstraction has 20582 states and 49773 transitions. [2022-03-01 17:05:38,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:38,395 INFO L276 IsEmpty]: Start isEmpty. Operand 20582 states and 49773 transitions. [2022-03-01 17:05:38,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:38,415 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:38,415 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:38,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-01 17:05:38,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-01 17:05:38,616 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1275709594, now seen corresponding path program 78 times [2022-03-01 17:05:38,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:38,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413387314] [2022-03-01 17:05:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:38,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:38,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:38,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413387314] [2022-03-01 17:05:38,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413387314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:38,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645644467] [2022-03-01 17:05:38,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:05:38,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:38,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:38,656 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:38,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:05:38,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:05:38,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:38,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:38,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:38,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645644467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:38,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:38,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-03-01 17:05:38,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882275552] [2022-03-01 17:05:38,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:38,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:38,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:38,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:38,853 INFO L87 Difference]: Start difference. First operand 20582 states and 49773 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:39,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:39,697 INFO L93 Difference]: Finished difference Result 29066 states and 69261 transitions. [2022-03-01 17:05:39,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:05:39,698 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:39,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:39,747 INFO L225 Difference]: With dead ends: 29066 [2022-03-01 17:05:39,747 INFO L226 Difference]: Without dead ends: 29054 [2022-03-01 17:05:39,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1618 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:05:39,747 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 254 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:39,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 264 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29054 states. [2022-03-01 17:05:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29054 to 24272. [2022-03-01 17:05:40,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24272 states, 24271 states have (on average 2.411890733797536) internal successors, (58539), 24271 states have internal predecessors, (58539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:40,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24272 states to 24272 states and 58539 transitions. [2022-03-01 17:05:40,362 INFO L78 Accepts]: Start accepts. Automaton has 24272 states and 58539 transitions. Word has length 33 [2022-03-01 17:05:40,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:40,363 INFO L470 AbstractCegarLoop]: Abstraction has 24272 states and 58539 transitions. [2022-03-01 17:05:40,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:40,363 INFO L276 IsEmpty]: Start isEmpty. Operand 24272 states and 58539 transitions. [2022-03-01 17:05:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:40,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:40,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:40,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 17:05:40,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:40,584 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:40,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1837566094, now seen corresponding path program 79 times [2022-03-01 17:05:40,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:40,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838194062] [2022-03-01 17:05:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:40,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:40,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:40,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:40,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838194062] [2022-03-01 17:05:40,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838194062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:40,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671265190] [2022-03-01 17:05:40,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:05:40,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:40,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:40,639 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:40,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:05:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:40,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:40,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:40,773 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:40,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:40,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671265190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:40,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:40,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-03-01 17:05:40,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545965881] [2022-03-01 17:05:40,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:40,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:05:40,838 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:40,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:05:40,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:05:40,839 INFO L87 Difference]: Start difference. First operand 24272 states and 58539 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:41,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:41,099 INFO L93 Difference]: Finished difference Result 27352 states and 65734 transitions. [2022-03-01 17:05:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:05:41,100 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:41,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:41,146 INFO L225 Difference]: With dead ends: 27352 [2022-03-01 17:05:41,147 INFO L226 Difference]: Without dead ends: 27352 [2022-03-01 17:05:41,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:05:41,147 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 92 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:41,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 221 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:41,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27352 states. [2022-03-01 17:05:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27352 to 24467. [2022-03-01 17:05:41,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24467 states, 24466 states have (on average 2.412245565274258) internal successors, (59018), 24466 states have internal predecessors, (59018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:41,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24467 states to 24467 states and 59018 transitions. [2022-03-01 17:05:41,655 INFO L78 Accepts]: Start accepts. Automaton has 24467 states and 59018 transitions. Word has length 33 [2022-03-01 17:05:41,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:41,656 INFO L470 AbstractCegarLoop]: Abstraction has 24467 states and 59018 transitions. [2022-03-01 17:05:41,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:41,656 INFO L276 IsEmpty]: Start isEmpty. Operand 24467 states and 59018 transitions. [2022-03-01 17:05:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:41,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:41,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:41,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:41,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:41,878 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:41,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1546067598, now seen corresponding path program 80 times [2022-03-01 17:05:41,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:41,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886001519] [2022-03-01 17:05:41,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:41,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:41,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:41,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886001519] [2022-03-01 17:05:41,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886001519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:41,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638062228] [2022-03-01 17:05:41,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:05:41,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:41,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:41,928 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:41,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:05:41,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:05:41,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:41,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:41,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:42,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:42,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638062228] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:42,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:42,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2022-03-01 17:05:42,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305624473] [2022-03-01 17:05:42,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:42,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:05:42,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:05:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:05:42,091 INFO L87 Difference]: Start difference. First operand 24467 states and 59018 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:42,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:42,286 INFO L93 Difference]: Finished difference Result 29499 states and 70438 transitions. [2022-03-01 17:05:42,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:05:42,287 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:42,336 INFO L225 Difference]: With dead ends: 29499 [2022-03-01 17:05:42,336 INFO L226 Difference]: Without dead ends: 29477 [2022-03-01 17:05:42,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:05:42,337 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 154 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:42,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 140 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29477 states. [2022-03-01 17:05:42,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29477 to 24467. [2022-03-01 17:05:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24467 states, 24466 states have (on average 2.4122046922259464) internal successors, (59017), 24466 states have internal predecessors, (59017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24467 states to 24467 states and 59017 transitions. [2022-03-01 17:05:42,974 INFO L78 Accepts]: Start accepts. Automaton has 24467 states and 59017 transitions. Word has length 33 [2022-03-01 17:05:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:42,975 INFO L470 AbstractCegarLoop]: Abstraction has 24467 states and 59017 transitions. [2022-03-01 17:05:42,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 24467 states and 59017 transitions. [2022-03-01 17:05:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:42,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:42,997 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:43,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 17:05:43,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:43,198 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:43,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:43,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1247459948, now seen corresponding path program 81 times [2022-03-01 17:05:43,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:43,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284750423] [2022-03-01 17:05:43,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:43,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:43,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:43,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284750423] [2022-03-01 17:05:43,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284750423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:43,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100267523] [2022-03-01 17:05:43,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:05:43,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:43,249 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:43,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:05:43,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:05:43,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:43,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:43,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:43,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:43,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100267523] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:43,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:43,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:43,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227046210] [2022-03-01 17:05:43,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:43,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:43,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:43,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:43,434 INFO L87 Difference]: Start difference. First operand 24467 states and 59017 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:43,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:43,755 INFO L93 Difference]: Finished difference Result 26726 states and 63944 transitions. [2022-03-01 17:05:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:05:43,755 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:43,803 INFO L225 Difference]: With dead ends: 26726 [2022-03-01 17:05:43,803 INFO L226 Difference]: Without dead ends: 26726 [2022-03-01 17:05:43,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:05:43,804 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 122 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:43,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 203 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:43,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26726 states. [2022-03-01 17:05:44,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26726 to 24638. [2022-03-01 17:05:44,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24638 states, 24637 states have (on average 2.4116572634655196) internal successors, (59416), 24637 states have internal predecessors, (59416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:44,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24638 states to 24638 states and 59416 transitions. [2022-03-01 17:05:44,343 INFO L78 Accepts]: Start accepts. Automaton has 24638 states and 59416 transitions. Word has length 33 [2022-03-01 17:05:44,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:44,343 INFO L470 AbstractCegarLoop]: Abstraction has 24638 states and 59416 transitions. [2022-03-01 17:05:44,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:44,343 INFO L276 IsEmpty]: Start isEmpty. Operand 24638 states and 59416 transitions. [2022-03-01 17:05:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:44,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:44,462 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:44,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-01 17:05:44,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:44,678 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:44,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:44,679 INFO L85 PathProgramCache]: Analyzing trace with hash 501723950, now seen corresponding path program 82 times [2022-03-01 17:05:44,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:44,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772776104] [2022-03-01 17:05:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:44,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:44,724 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:44,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:44,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772776104] [2022-03-01 17:05:44,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772776104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:44,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709091333] [2022-03-01 17:05:44,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:05:44,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:44,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:44,726 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:44,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:05:44,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:05:44,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:44,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:44,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:44,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:44,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709091333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:44,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:44,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:44,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118645385] [2022-03-01 17:05:44,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:44,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:44,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:44,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:44,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:44,898 INFO L87 Difference]: Start difference. First operand 24638 states and 59416 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:45,257 INFO L93 Difference]: Finished difference Result 29922 states and 71247 transitions. [2022-03-01 17:05:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:05:45,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:45,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:45,310 INFO L225 Difference]: With dead ends: 29922 [2022-03-01 17:05:45,310 INFO L226 Difference]: Without dead ends: 29902 [2022-03-01 17:05:45,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:05:45,310 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 251 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:45,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 134 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:05:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29902 states. [2022-03-01 17:05:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29902 to 25555. [2022-03-01 17:05:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25555 states, 25554 states have (on average 2.415668779838773) internal successors, (61730), 25554 states have internal predecessors, (61730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:45,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25555 states to 25555 states and 61730 transitions. [2022-03-01 17:05:45,873 INFO L78 Accepts]: Start accepts. Automaton has 25555 states and 61730 transitions. Word has length 33 [2022-03-01 17:05:45,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:45,873 INFO L470 AbstractCegarLoop]: Abstraction has 25555 states and 61730 transitions. [2022-03-01 17:05:45,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:45,873 INFO L276 IsEmpty]: Start isEmpty. Operand 25555 states and 61730 transitions. [2022-03-01 17:05:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:45,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:45,897 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:45,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-01 17:05:46,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:46,097 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash -517605580, now seen corresponding path program 83 times [2022-03-01 17:05:46,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:46,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328911745] [2022-03-01 17:05:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:46,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:46,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328911745] [2022-03-01 17:05:46,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328911745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:46,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256260047] [2022-03-01 17:05:46,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:05:46,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:46,159 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:46,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:05:46,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:05:46,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:46,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:46,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:46,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256260047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:46,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:46,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:46,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837801518] [2022-03-01 17:05:46,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:46,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:46,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:46,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:46,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:46,363 INFO L87 Difference]: Start difference. First operand 25555 states and 61730 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:47,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:47,146 INFO L93 Difference]: Finished difference Result 28456 states and 68010 transitions. [2022-03-01 17:05:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:05:47,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:47,194 INFO L225 Difference]: With dead ends: 28456 [2022-03-01 17:05:47,195 INFO L226 Difference]: Without dead ends: 28456 [2022-03-01 17:05:47,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:05:47,195 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 123 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:47,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 303 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28456 states. [2022-03-01 17:05:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28456 to 26023. [2022-03-01 17:05:47,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26023 states, 26022 states have (on average 2.4139189916224733) internal successors, (62815), 26022 states have internal predecessors, (62815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26023 states to 26023 states and 62815 transitions. [2022-03-01 17:05:47,697 INFO L78 Accepts]: Start accepts. Automaton has 26023 states and 62815 transitions. Word has length 33 [2022-03-01 17:05:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:47,697 INFO L470 AbstractCegarLoop]: Abstraction has 26023 states and 62815 transitions. [2022-03-01 17:05:47,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 26023 states and 62815 transitions. [2022-03-01 17:05:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:47,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:47,721 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:47,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-01 17:05:47,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:47,923 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1681947214, now seen corresponding path program 84 times [2022-03-01 17:05:47,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:47,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214393930] [2022-03-01 17:05:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:47,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:47,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:47,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214393930] [2022-03-01 17:05:47,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214393930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:47,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923275765] [2022-03-01 17:05:47,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:05:47,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:47,984 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:47,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:05:48,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:05:48,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:48,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:48,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:48,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:48,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:48,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923275765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:48,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:48,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:48,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111120010] [2022-03-01 17:05:48,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:48,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:48,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:48,179 INFO L87 Difference]: Start difference. First operand 26023 states and 62815 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:48,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:48,737 INFO L93 Difference]: Finished difference Result 35447 states and 84761 transitions. [2022-03-01 17:05:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:05:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:48,796 INFO L225 Difference]: With dead ends: 35447 [2022-03-01 17:05:48,796 INFO L226 Difference]: Without dead ends: 35419 [2022-03-01 17:05:48,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=1573, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:05:48,797 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 350 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:48,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 168 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:48,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35419 states. [2022-03-01 17:05:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35419 to 29307. [2022-03-01 17:05:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29307 states, 29306 states have (on average 2.4098136900293454) internal successors, (70622), 29306 states have internal predecessors, (70622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:49,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29307 states to 29307 states and 70622 transitions. [2022-03-01 17:05:49,449 INFO L78 Accepts]: Start accepts. Automaton has 29307 states and 70622 transitions. Word has length 33 [2022-03-01 17:05:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:49,449 INFO L470 AbstractCegarLoop]: Abstraction has 29307 states and 70622 transitions. [2022-03-01 17:05:49,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 29307 states and 70622 transitions. [2022-03-01 17:05:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:49,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:49,475 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:49,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:49,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-01 17:05:49,676 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:49,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1257689236, now seen corresponding path program 85 times [2022-03-01 17:05:49,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:49,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580422568] [2022-03-01 17:05:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:49,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:49,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:49,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580422568] [2022-03-01 17:05:49,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580422568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:49,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069655270] [2022-03-01 17:05:49,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:05:49,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:49,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:49,734 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:49,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:05:49,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:49,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:49,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:49,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:49,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069655270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:49,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:49,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:49,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145789773] [2022-03-01 17:05:49,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:49,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:49,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:49,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:49,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:49,918 INFO L87 Difference]: Start difference. First operand 29307 states and 70622 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:50,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:50,774 INFO L93 Difference]: Finished difference Result 33697 states and 80300 transitions. [2022-03-01 17:05:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-01 17:05:50,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:50,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:50,840 INFO L225 Difference]: With dead ends: 33697 [2022-03-01 17:05:50,840 INFO L226 Difference]: Without dead ends: 33697 [2022-03-01 17:05:50,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 17:05:50,841 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 134 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:50,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 362 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33697 states. [2022-03-01 17:05:51,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33697 to 30105. [2022-03-01 17:05:51,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30105 states, 30104 states have (on average 2.4114403401541322) internal successors, (72594), 30104 states have internal predecessors, (72594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30105 states to 30105 states and 72594 transitions. [2022-03-01 17:05:51,501 INFO L78 Accepts]: Start accepts. Automaton has 30105 states and 72594 transitions. Word has length 33 [2022-03-01 17:05:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:51,501 INFO L470 AbstractCegarLoop]: Abstraction has 30105 states and 72594 transitions. [2022-03-01 17:05:51,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:51,501 INFO L276 IsEmpty]: Start isEmpty. Operand 30105 states and 72594 transitions. [2022-03-01 17:05:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:51,525 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:51,525 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:51,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-01 17:05:51,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-01 17:05:51,726 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1863818834, now seen corresponding path program 86 times [2022-03-01 17:05:51,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:51,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108022223] [2022-03-01 17:05:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:51,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:51,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108022223] [2022-03-01 17:05:51,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108022223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:51,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532442285] [2022-03-01 17:05:51,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:05:51,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:51,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:51,786 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:51,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:05:51,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:05:51,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:51,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:51,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:51,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532442285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:51,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:52,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:52,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250127875] [2022-03-01 17:05:52,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:52,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:52,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:52,000 INFO L87 Difference]: Start difference. First operand 30105 states and 72594 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:52,667 INFO L93 Difference]: Finished difference Result 37149 states and 89163 transitions. [2022-03-01 17:05:52,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:05:52,668 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:52,726 INFO L225 Difference]: With dead ends: 37149 [2022-03-01 17:05:52,727 INFO L226 Difference]: Without dead ends: 37125 [2022-03-01 17:05:52,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:05:52,727 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 283 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:52,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 287 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:52,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37125 states. [2022-03-01 17:05:53,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37125 to 31549. [2022-03-01 17:05:53,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31549 states, 31548 states have (on average 2.4157157347533915) internal successors, (76211), 31548 states have internal predecessors, (76211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31549 states to 31549 states and 76211 transitions. [2022-03-01 17:05:53,536 INFO L78 Accepts]: Start accepts. Automaton has 31549 states and 76211 transitions. Word has length 33 [2022-03-01 17:05:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:53,536 INFO L470 AbstractCegarLoop]: Abstraction has 31549 states and 76211 transitions. [2022-03-01 17:05:53,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 31549 states and 76211 transitions. [2022-03-01 17:05:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:53,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:53,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:53,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:53,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-01 17:05:53,762 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash 554934836, now seen corresponding path program 87 times [2022-03-01 17:05:53,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:53,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778951149] [2022-03-01 17:05:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:53,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:53,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:53,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778951149] [2022-03-01 17:05:53,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778951149] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:53,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404248057] [2022-03-01 17:05:53,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:05:53,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:53,809 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:53,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:05:53,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:05:53,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:53,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:53,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:53,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404248057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:53,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:53,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:53,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202930740] [2022-03-01 17:05:53,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:53,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:53,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:53,993 INFO L87 Difference]: Start difference. First operand 31549 states and 76211 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:54,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:54,733 INFO L93 Difference]: Finished difference Result 35699 states and 85430 transitions. [2022-03-01 17:05:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:05:54,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:54,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:54,953 INFO L225 Difference]: With dead ends: 35699 [2022-03-01 17:05:54,953 INFO L226 Difference]: Without dead ends: 35699 [2022-03-01 17:05:54,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:05:54,953 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 195 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:54,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 288 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:54,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35699 states. [2022-03-01 17:05:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35699 to 32809. [2022-03-01 17:05:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32809 states, 32808 states have (on average 2.4214216044867105) internal successors, (79442), 32808 states have internal predecessors, (79442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32809 states to 32809 states and 79442 transitions. [2022-03-01 17:05:55,530 INFO L78 Accepts]: Start accepts. Automaton has 32809 states and 79442 transitions. Word has length 33 [2022-03-01 17:05:55,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:55,530 INFO L470 AbstractCegarLoop]: Abstraction has 32809 states and 79442 transitions. [2022-03-01 17:05:55,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 32809 states and 79442 transitions. [2022-03-01 17:05:55,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:55,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:55,556 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:55,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-01 17:05:55,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:55,756 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:55,757 INFO L85 PathProgramCache]: Analyzing trace with hash -140417230, now seen corresponding path program 88 times [2022-03-01 17:05:55,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:55,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61601043] [2022-03-01 17:05:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:55,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:55,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:55,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61601043] [2022-03-01 17:05:55,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61601043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:55,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123258384] [2022-03-01 17:05:55,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:05:55,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:55,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:55,804 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:55,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:05:55,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:05:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:55,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:55,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:56,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:56,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:56,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123258384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:56,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:56,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:56,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206407784] [2022-03-01 17:05:56,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:56,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:56,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:56,130 INFO L87 Difference]: Start difference. First operand 32809 states and 79442 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:56,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:56,713 INFO L93 Difference]: Finished difference Result 39072 states and 93960 transitions. [2022-03-01 17:05:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:05:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:56,786 INFO L225 Difference]: With dead ends: 39072 [2022-03-01 17:05:56,786 INFO L226 Difference]: Without dead ends: 39066 [2022-03-01 17:05:56,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:05:56,787 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 305 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:56,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 253 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39066 states. [2022-03-01 17:05:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39066 to 33965. [2022-03-01 17:05:57,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33965 states, 33964 states have (on average 2.4235366859027203) internal successors, (82313), 33964 states have internal predecessors, (82313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:57,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33965 states to 33965 states and 82313 transitions. [2022-03-01 17:05:57,552 INFO L78 Accepts]: Start accepts. Automaton has 33965 states and 82313 transitions. Word has length 33 [2022-03-01 17:05:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:57,552 INFO L470 AbstractCegarLoop]: Abstraction has 33965 states and 82313 transitions. [2022-03-01 17:05:57,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:57,552 INFO L276 IsEmpty]: Start isEmpty. Operand 33965 states and 82313 transitions. [2022-03-01 17:05:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:57,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:57,577 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:57,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-01 17:05:57,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:57,778 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:05:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:05:57,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1558460462, now seen corresponding path program 89 times [2022-03-01 17:05:57,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:05:57,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371352709] [2022-03-01 17:05:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:05:57,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:05:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:05:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:57,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:05:57,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371352709] [2022-03-01 17:05:57,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371352709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:05:57,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890561524] [2022-03-01 17:05:57,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:05:57,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:05:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:05:57,824 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:05:57,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:05:57,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:05:57,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:05:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:05:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:05:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:57,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:05:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:05:58,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890561524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:05:58,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:05:58,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:05:58,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933454044] [2022-03-01 17:05:58,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:05:58,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:05:58,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:05:58,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:05:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:05:58,021 INFO L87 Difference]: Start difference. First operand 33965 states and 82313 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:58,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:05:58,953 INFO L93 Difference]: Finished difference Result 38739 states and 92205 transitions. [2022-03-01 17:05:58,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-01 17:05:58,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:05:58,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:05:59,018 INFO L225 Difference]: With dead ends: 38739 [2022-03-01 17:05:59,018 INFO L226 Difference]: Without dead ends: 38724 [2022-03-01 17:05:59,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2022-03-01 17:05:59,019 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 317 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:05:59,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 299 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:05:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38724 states. [2022-03-01 17:05:59,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38724 to 31951. [2022-03-01 17:05:59,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31951 states, 31950 states have (on average 2.4071048513302036) internal successors, (76907), 31950 states have internal predecessors, (76907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31951 states to 31951 states and 76907 transitions. [2022-03-01 17:05:59,842 INFO L78 Accepts]: Start accepts. Automaton has 31951 states and 76907 transitions. Word has length 33 [2022-03-01 17:05:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:05:59,842 INFO L470 AbstractCegarLoop]: Abstraction has 31951 states and 76907 transitions. [2022-03-01 17:05:59,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:05:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 31951 states and 76907 transitions. [2022-03-01 17:05:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:05:59,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:05:59,869 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:05:59,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:00,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-01 17:06:00,070 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:00,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1910187214, now seen corresponding path program 90 times [2022-03-01 17:06:00,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:00,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147119900] [2022-03-01 17:06:00,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:00,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:00,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:00,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147119900] [2022-03-01 17:06:00,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147119900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:00,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116296474] [2022-03-01 17:06:00,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:06:00,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:00,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:00,123 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:00,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:06:00,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:06:00,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:00,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:00,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:00,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:00,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116296474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:00,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:00,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-03-01 17:06:00,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103446640] [2022-03-01 17:06:00,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:00,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:00,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:00,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:00,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:00,298 INFO L87 Difference]: Start difference. First operand 31951 states and 76907 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:00,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:00,867 INFO L93 Difference]: Finished difference Result 33646 states and 80405 transitions. [2022-03-01 17:06:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:06:00,867 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:00,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:00,934 INFO L225 Difference]: With dead ends: 33646 [2022-03-01 17:06:00,934 INFO L226 Difference]: Without dead ends: 33640 [2022-03-01 17:06:00,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:06:00,935 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 155 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:00,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 294 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33640 states. [2022-03-01 17:06:01,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33640 to 28584. [2022-03-01 17:06:01,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28584 states, 28583 states have (on average 2.402581954308505) internal successors, (68673), 28583 states have internal predecessors, (68673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28584 states to 28584 states and 68673 transitions. [2022-03-01 17:06:01,653 INFO L78 Accepts]: Start accepts. Automaton has 28584 states and 68673 transitions. Word has length 33 [2022-03-01 17:06:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:01,653 INFO L470 AbstractCegarLoop]: Abstraction has 28584 states and 68673 transitions. [2022-03-01 17:06:01,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 28584 states and 68673 transitions. [2022-03-01 17:06:01,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:01,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:01,675 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:01,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:01,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-01 17:06:01,876 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:01,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:01,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1867635086, now seen corresponding path program 91 times [2022-03-01 17:06:01,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:01,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224609466] [2022-03-01 17:06:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:01,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:01,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:01,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224609466] [2022-03-01 17:06:01,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224609466] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:01,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123925852] [2022-03-01 17:06:01,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:06:01,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:01,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:01,933 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:01,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:06:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:01,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:01,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:02,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:02,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123925852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:02,122 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:02,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-01 17:06:02,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679897922] [2022-03-01 17:06:02,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:02,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:06:02,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:06:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:06:02,123 INFO L87 Difference]: Start difference. First operand 28584 states and 68673 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:02,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:02,652 INFO L93 Difference]: Finished difference Result 31047 states and 73946 transitions. [2022-03-01 17:06:02,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:06:02,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:02,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:02,701 INFO L225 Difference]: With dead ends: 31047 [2022-03-01 17:06:02,702 INFO L226 Difference]: Without dead ends: 31025 [2022-03-01 17:06:02,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=631, Invalid=1439, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:06:02,702 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 120 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:02,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 263 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:02,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31025 states. [2022-03-01 17:06:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31025 to 28517. [2022-03-01 17:06:03,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28517 states, 28516 states have (on average 2.402966755505681) internal successors, (68523), 28516 states have internal predecessors, (68523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:03,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28517 states to 28517 states and 68523 transitions. [2022-03-01 17:06:03,360 INFO L78 Accepts]: Start accepts. Automaton has 28517 states and 68523 transitions. Word has length 33 [2022-03-01 17:06:03,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:03,360 INFO L470 AbstractCegarLoop]: Abstraction has 28517 states and 68523 transitions. [2022-03-01 17:06:03,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 28517 states and 68523 transitions. [2022-03-01 17:06:03,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:03,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:03,383 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:03,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-01 17:06:03,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 17:06:03,589 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:03,589 INFO L85 PathProgramCache]: Analyzing trace with hash 366876366, now seen corresponding path program 92 times [2022-03-01 17:06:03,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:03,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65274259] [2022-03-01 17:06:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:03,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:03,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:03,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65274259] [2022-03-01 17:06:03,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65274259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:03,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795359338] [2022-03-01 17:06:03,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:06:03,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:03,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:03,645 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:03,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:06:03,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:06:03,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:03,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:03,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:03,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:03,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795359338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:03,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:03,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-01 17:06:03,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928419304] [2022-03-01 17:06:03,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:03,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:03,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:03,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:03,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:03,841 INFO L87 Difference]: Start difference. First operand 28517 states and 68523 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:04,415 INFO L93 Difference]: Finished difference Result 31772 states and 75615 transitions. [2022-03-01 17:06:04,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:06:04,415 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:04,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:04,474 INFO L225 Difference]: With dead ends: 31772 [2022-03-01 17:06:04,475 INFO L226 Difference]: Without dead ends: 31762 [2022-03-01 17:06:04,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:06:04,475 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 126 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:04,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 246 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:04,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31762 states. [2022-03-01 17:06:04,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31762 to 28744. [2022-03-01 17:06:04,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28744 states, 28743 states have (on average 2.4025675816720593) internal successors, (69057), 28743 states have internal predecessors, (69057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:05,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28744 states to 28744 states and 69057 transitions. [2022-03-01 17:06:05,180 INFO L78 Accepts]: Start accepts. Automaton has 28744 states and 69057 transitions. Word has length 33 [2022-03-01 17:06:05,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:05,180 INFO L470 AbstractCegarLoop]: Abstraction has 28744 states and 69057 transitions. [2022-03-01 17:06:05,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 28744 states and 69057 transitions. [2022-03-01 17:06:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:05,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:05,202 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:05,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-01 17:06:05,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:05,402 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:05,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1229135474, now seen corresponding path program 93 times [2022-03-01 17:06:05,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:05,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072780031] [2022-03-01 17:06:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:05,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:05,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:05,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072780031] [2022-03-01 17:06:05,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072780031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:05,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362809870] [2022-03-01 17:06:05,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:06:05,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:05,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:05,453 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:05,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:06:05,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:06:05,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:05,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:05,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:05,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:05,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:05,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362809870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:05,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:05,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-01 17:06:05,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681931173] [2022-03-01 17:06:05,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:05,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:05,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:05,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:05,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:05,665 INFO L87 Difference]: Start difference. First operand 28744 states and 69057 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:06,356 INFO L93 Difference]: Finished difference Result 34173 states and 81150 transitions. [2022-03-01 17:06:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:06:06,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:06,419 INFO L225 Difference]: With dead ends: 34173 [2022-03-01 17:06:06,419 INFO L226 Difference]: Without dead ends: 34169 [2022-03-01 17:06:06,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:06:06,420 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 133 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:06,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 315 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34169 states. [2022-03-01 17:06:07,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34169 to 29028. [2022-03-01 17:06:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29028 states, 29027 states have (on average 2.401384917490612) internal successors, (69705), 29027 states have internal predecessors, (69705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:07,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29028 states to 29028 states and 69705 transitions. [2022-03-01 17:06:07,121 INFO L78 Accepts]: Start accepts. Automaton has 29028 states and 69705 transitions. Word has length 33 [2022-03-01 17:06:07,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:07,121 INFO L470 AbstractCegarLoop]: Abstraction has 29028 states and 69705 transitions. [2022-03-01 17:06:07,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:07,122 INFO L276 IsEmpty]: Start isEmpty. Operand 29028 states and 69705 transitions. [2022-03-01 17:06:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:07,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:07,147 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:07,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-01 17:06:07,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:07,347 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:07,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:07,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1435504334, now seen corresponding path program 94 times [2022-03-01 17:06:07,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:07,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301687754] [2022-03-01 17:06:07,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:07,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:07,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:07,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301687754] [2022-03-01 17:06:07,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301687754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:07,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701817938] [2022-03-01 17:06:07,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:06:07,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:07,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:07,400 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:07,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:06:07,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:06:07,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:07,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:07,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:07,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701817938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:07,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:07,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-01 17:06:07,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167391791] [2022-03-01 17:06:07,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:07,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:07,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:07,605 INFO L87 Difference]: Start difference. First operand 29028 states and 69705 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:08,389 INFO L93 Difference]: Finished difference Result 34423 states and 81836 transitions. [2022-03-01 17:06:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-01 17:06:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:08,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:08,452 INFO L225 Difference]: With dead ends: 34423 [2022-03-01 17:06:08,453 INFO L226 Difference]: Without dead ends: 34423 [2022-03-01 17:06:08,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:06:08,453 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 189 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:08,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 331 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34423 states. [2022-03-01 17:06:09,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34423 to 30566. [2022-03-01 17:06:09,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30566 states, 30565 states have (on average 2.405332897104531) internal successors, (73519), 30565 states have internal predecessors, (73519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30566 states to 30566 states and 73519 transitions. [2022-03-01 17:06:09,191 INFO L78 Accepts]: Start accepts. Automaton has 30566 states and 73519 transitions. Word has length 33 [2022-03-01 17:06:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:09,191 INFO L470 AbstractCegarLoop]: Abstraction has 30566 states and 73519 transitions. [2022-03-01 17:06:09,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 30566 states and 73519 transitions. [2022-03-01 17:06:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:09,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:09,216 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:09,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:06:09,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-01 17:06:09,416 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1504210584, now seen corresponding path program 95 times [2022-03-01 17:06:09,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:09,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754580463] [2022-03-01 17:06:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:09,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:09,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:09,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:09,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754580463] [2022-03-01 17:06:09,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754580463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:09,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782673477] [2022-03-01 17:06:09,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:06:09,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:09,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:09,475 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:09,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:06:09,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-01 17:06:09,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:09,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:09,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:09,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:09,647 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:09,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782673477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:09,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:09,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 16 [2022-03-01 17:06:09,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945421137] [2022-03-01 17:06:09,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:09,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:09,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:09,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:09,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:09,648 INFO L87 Difference]: Start difference. First operand 30566 states and 73519 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:10,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:10,226 INFO L93 Difference]: Finished difference Result 33401 states and 79605 transitions. [2022-03-01 17:06:10,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:06:10,227 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:10,284 INFO L225 Difference]: With dead ends: 33401 [2022-03-01 17:06:10,285 INFO L226 Difference]: Without dead ends: 33392 [2022-03-01 17:06:10,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=847, Invalid=1703, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:06:10,285 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 210 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:10,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 289 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:10,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33392 states. [2022-03-01 17:06:10,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33392 to 26944. [2022-03-01 17:06:10,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26944 states, 26943 states have (on average 2.395427383736035) internal successors, (64540), 26943 states have internal predecessors, (64540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:11,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26944 states to 26944 states and 64540 transitions. [2022-03-01 17:06:11,024 INFO L78 Accepts]: Start accepts. Automaton has 26944 states and 64540 transitions. Word has length 33 [2022-03-01 17:06:11,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:11,024 INFO L470 AbstractCegarLoop]: Abstraction has 26944 states and 64540 transitions. [2022-03-01 17:06:11,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:11,024 INFO L276 IsEmpty]: Start isEmpty. Operand 26944 states and 64540 transitions. [2022-03-01 17:06:11,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:11,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:11,046 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:11,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:11,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:11,247 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:11,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:11,247 INFO L85 PathProgramCache]: Analyzing trace with hash -2010556850, now seen corresponding path program 96 times [2022-03-01 17:06:11,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:11,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355614389] [2022-03-01 17:06:11,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:11,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:11,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:11,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355614389] [2022-03-01 17:06:11,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355614389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:11,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581572527] [2022-03-01 17:06:11,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:06:11,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:11,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:11,303 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:11,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:06:11,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:06:11,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:11,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:11,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:11,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:11,490 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:11,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581572527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:11,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:11,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-01 17:06:11,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640931758] [2022-03-01 17:06:11,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:11,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:06:11,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:11,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:06:11,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:06:11,491 INFO L87 Difference]: Start difference. First operand 26944 states and 64540 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:12,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:12,047 INFO L93 Difference]: Finished difference Result 30318 states and 71996 transitions. [2022-03-01 17:06:12,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:06:12,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:12,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:12,099 INFO L225 Difference]: With dead ends: 30318 [2022-03-01 17:06:12,099 INFO L226 Difference]: Without dead ends: 30294 [2022-03-01 17:06:12,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:06:12,100 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 154 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:12,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 318 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:12,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30294 states. [2022-03-01 17:06:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30294 to 26469. [2022-03-01 17:06:12,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26469 states, 26468 states have (on average 2.400861417560828) internal successors, (63546), 26468 states have internal predecessors, (63546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26469 states to 26469 states and 63546 transitions. [2022-03-01 17:06:12,630 INFO L78 Accepts]: Start accepts. Automaton has 26469 states and 63546 transitions. Word has length 33 [2022-03-01 17:06:12,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:12,630 INFO L470 AbstractCegarLoop]: Abstraction has 26469 states and 63546 transitions. [2022-03-01 17:06:12,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:12,630 INFO L276 IsEmpty]: Start isEmpty. Operand 26469 states and 63546 transitions. [2022-03-01 17:06:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:12,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:12,651 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:12,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-01 17:06:12,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:12,852 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:12,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:12,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1631811504, now seen corresponding path program 97 times [2022-03-01 17:06:12,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:12,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136738401] [2022-03-01 17:06:12,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:12,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:12,907 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:12,907 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:12,907 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136738401] [2022-03-01 17:06:12,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136738401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:12,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730404491] [2022-03-01 17:06:12,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:06:12,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:12,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:12,909 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:12,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:06:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:12,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:12,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:13,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:13,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730404491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:13,111 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:13,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:06:13,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112394465] [2022-03-01 17:06:13,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:13,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:06:13,111 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:13,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:06:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:06:13,111 INFO L87 Difference]: Start difference. First operand 26469 states and 63546 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:13,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:13,756 INFO L93 Difference]: Finished difference Result 28516 states and 67822 transitions. [2022-03-01 17:06:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:06:13,756 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:13,804 INFO L225 Difference]: With dead ends: 28516 [2022-03-01 17:06:13,804 INFO L226 Difference]: Without dead ends: 28494 [2022-03-01 17:06:13,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1676, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:06:13,804 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 128 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:13,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 264 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:06:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28494 states. [2022-03-01 17:06:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28494 to 26253. [2022-03-01 17:06:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26253 states, 26252 states have (on average 2.400693280511961) internal successors, (63023), 26252 states have internal predecessors, (63023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:14,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26253 states to 26253 states and 63023 transitions. [2022-03-01 17:06:14,313 INFO L78 Accepts]: Start accepts. Automaton has 26253 states and 63023 transitions. Word has length 33 [2022-03-01 17:06:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:14,313 INFO L470 AbstractCegarLoop]: Abstraction has 26253 states and 63023 transitions. [2022-03-01 17:06:14,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:14,314 INFO L276 IsEmpty]: Start isEmpty. Operand 26253 states and 63023 transitions. [2022-03-01 17:06:14,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:14,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:14,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:14,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-01 17:06:14,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:14,535 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:14,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:14,535 INFO L85 PathProgramCache]: Analyzing trace with hash -738026316, now seen corresponding path program 98 times [2022-03-01 17:06:14,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:14,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299771716] [2022-03-01 17:06:14,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:14,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:14,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:14,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299771716] [2022-03-01 17:06:14,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299771716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:14,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353296650] [2022-03-01 17:06:14,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:06:14,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:14,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:14,578 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:14,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:06:14,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:06:14,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:14,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:14,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:14,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:14,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353296650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:14,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:14,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-03-01 17:06:14,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719205384] [2022-03-01 17:06:14,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:14,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:06:14,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:14,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:06:14,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:06:14,779 INFO L87 Difference]: Start difference. First operand 26253 states and 63023 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:15,388 INFO L93 Difference]: Finished difference Result 30910 states and 73350 transitions. [2022-03-01 17:06:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:06:15,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:15,439 INFO L225 Difference]: With dead ends: 30910 [2022-03-01 17:06:15,439 INFO L226 Difference]: Without dead ends: 30900 [2022-03-01 17:06:15,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=732, Invalid=1718, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:06:15,440 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 138 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:15,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 254 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:15,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30900 states. [2022-03-01 17:06:15,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30900 to 26551. [2022-03-01 17:06:15,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26551 states, 26550 states have (on average 2.3992090395480226) internal successors, (63699), 26550 states have internal predecessors, (63699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26551 states to 26551 states and 63699 transitions. [2022-03-01 17:06:16,033 INFO L78 Accepts]: Start accepts. Automaton has 26551 states and 63699 transitions. Word has length 33 [2022-03-01 17:06:16,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:16,034 INFO L470 AbstractCegarLoop]: Abstraction has 26551 states and 63699 transitions. [2022-03-01 17:06:16,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:16,034 INFO L276 IsEmpty]: Start isEmpty. Operand 26551 states and 63699 transitions. [2022-03-01 17:06:16,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:16,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:16,055 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:16,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-01 17:06:16,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-01 17:06:16,256 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:16,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1497970224, now seen corresponding path program 99 times [2022-03-01 17:06:16,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:16,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549519227] [2022-03-01 17:06:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:16,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:16,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:16,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549519227] [2022-03-01 17:06:16,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549519227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:16,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950942297] [2022-03-01 17:06:16,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:06:16,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:16,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:16,292 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:16,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:06:16,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:06:16,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:16,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:16,610 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:16,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950942297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:16,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:16,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-01 17:06:16,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834959404] [2022-03-01 17:06:16,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:16,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:16,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:16,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:16,611 INFO L87 Difference]: Start difference. First operand 26551 states and 63699 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:17,266 INFO L93 Difference]: Finished difference Result 34573 states and 82100 transitions. [2022-03-01 17:06:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:06:17,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:17,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:17,324 INFO L225 Difference]: With dead ends: 34573 [2022-03-01 17:06:17,324 INFO L226 Difference]: Without dead ends: 34571 [2022-03-01 17:06:17,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=975, Invalid=1995, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:06:17,325 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 151 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:17,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 311 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:17,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34571 states. [2022-03-01 17:06:17,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34571 to 27411. [2022-03-01 17:06:17,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27411 states, 27410 states have (on average 2.39799343305363) internal successors, (65729), 27410 states have internal predecessors, (65729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27411 states to 27411 states and 65729 transitions. [2022-03-01 17:06:17,884 INFO L78 Accepts]: Start accepts. Automaton has 27411 states and 65729 transitions. Word has length 33 [2022-03-01 17:06:17,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:17,884 INFO L470 AbstractCegarLoop]: Abstraction has 27411 states and 65729 transitions. [2022-03-01 17:06:17,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:17,884 INFO L276 IsEmpty]: Start isEmpty. Operand 27411 states and 65729 transitions. [2022-03-01 17:06:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:17,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:17,906 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:17,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-01 17:06:18,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:18,107 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:18,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -8819148, now seen corresponding path program 100 times [2022-03-01 17:06:18,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:18,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132209926] [2022-03-01 17:06:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:18,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:18,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132209926] [2022-03-01 17:06:18,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132209926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:18,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097869279] [2022-03-01 17:06:18,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:06:18,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:18,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:18,144 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:18,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:06:18,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:06:18,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:18,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:18,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:18,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097869279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:18,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:18,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-01 17:06:18,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799474011] [2022-03-01 17:06:18,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:18,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:18,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:18,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:18,336 INFO L87 Difference]: Start difference. First operand 27411 states and 65729 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:19,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:19,191 INFO L93 Difference]: Finished difference Result 35488 states and 84024 transitions. [2022-03-01 17:06:19,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:06:19,192 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:19,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:19,251 INFO L225 Difference]: With dead ends: 35488 [2022-03-01 17:06:19,251 INFO L226 Difference]: Without dead ends: 35488 [2022-03-01 17:06:19,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2022-03-01 17:06:19,251 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 234 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:19,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 240 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35488 states. [2022-03-01 17:06:19,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35488 to 29994. [2022-03-01 17:06:19,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29994 states, 29993 states have (on average 2.400693495148868) internal successors, (72004), 29993 states have internal predecessors, (72004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29994 states to 29994 states and 72004 transitions. [2022-03-01 17:06:19,890 INFO L78 Accepts]: Start accepts. Automaton has 29994 states and 72004 transitions. Word has length 33 [2022-03-01 17:06:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:19,891 INFO L470 AbstractCegarLoop]: Abstraction has 29994 states and 72004 transitions. [2022-03-01 17:06:19,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 29994 states and 72004 transitions. [2022-03-01 17:06:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:19,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:19,914 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:19,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:20,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:20,114 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1346433230, now seen corresponding path program 101 times [2022-03-01 17:06:20,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:20,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463206779] [2022-03-01 17:06:20,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:20,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:20,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:20,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463206779] [2022-03-01 17:06:20,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463206779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:20,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685151516] [2022-03-01 17:06:20,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:06:20,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:20,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:20,150 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:20,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:06:20,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:06:20,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:20,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:20,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:20,280 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:20,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:20,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:20,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685151516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:20,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:20,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 16 [2022-03-01 17:06:20,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624272840] [2022-03-01 17:06:20,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:20,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:20,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:20,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:20,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:20,329 INFO L87 Difference]: Start difference. First operand 29994 states and 72004 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:20,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:20,967 INFO L93 Difference]: Finished difference Result 34655 states and 82191 transitions. [2022-03-01 17:06:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-01 17:06:20,967 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:20,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:21,030 INFO L225 Difference]: With dead ends: 34655 [2022-03-01 17:06:21,030 INFO L226 Difference]: Without dead ends: 34646 [2022-03-01 17:06:21,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1030, Invalid=2162, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:06:21,031 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 232 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:21,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 247 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:21,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34646 states. [2022-03-01 17:06:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34646 to 28301. [2022-03-01 17:06:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28301 states, 28300 states have (on average 2.3935689045936397) internal successors, (67738), 28300 states have internal predecessors, (67738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28301 states to 28301 states and 67738 transitions. [2022-03-01 17:06:21,791 INFO L78 Accepts]: Start accepts. Automaton has 28301 states and 67738 transitions. Word has length 33 [2022-03-01 17:06:21,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:21,791 INFO L470 AbstractCegarLoop]: Abstraction has 28301 states and 67738 transitions. [2022-03-01 17:06:21,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:21,791 INFO L276 IsEmpty]: Start isEmpty. Operand 28301 states and 67738 transitions. [2022-03-01 17:06:21,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:21,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:21,814 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:21,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:22,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-01 17:06:22,014 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:22,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:22,014 INFO L85 PathProgramCache]: Analyzing trace with hash 840086964, now seen corresponding path program 102 times [2022-03-01 17:06:22,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:22,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752570018] [2022-03-01 17:06:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:22,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:22,056 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:22,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752570018] [2022-03-01 17:06:22,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752570018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:22,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952004329] [2022-03-01 17:06:22,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:06:22,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:22,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:22,057 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:22,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:06:22,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:06:22,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:22,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:22,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:22,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:22,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952004329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:22,239 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:22,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-03-01 17:06:22,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412330553] [2022-03-01 17:06:22,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:22,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:06:22,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:22,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:06:22,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:06:22,240 INFO L87 Difference]: Start difference. First operand 28301 states and 67738 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:22,818 INFO L93 Difference]: Finished difference Result 33895 states and 80186 transitions. [2022-03-01 17:06:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-01 17:06:22,818 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:22,897 INFO L225 Difference]: With dead ends: 33895 [2022-03-01 17:06:22,897 INFO L226 Difference]: Without dead ends: 33859 [2022-03-01 17:06:22,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:06:22,898 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 214 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:22,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 254 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33859 states. [2022-03-01 17:06:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33859 to 27687. [2022-03-01 17:06:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27687 states, 27686 states have (on average 2.394567651520624) internal successors, (66296), 27686 states have internal predecessors, (66296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27687 states to 27687 states and 66296 transitions. [2022-03-01 17:06:23,632 INFO L78 Accepts]: Start accepts. Automaton has 27687 states and 66296 transitions. Word has length 33 [2022-03-01 17:06:23,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:23,632 INFO L470 AbstractCegarLoop]: Abstraction has 27687 states and 66296 transitions. [2022-03-01 17:06:23,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:23,632 INFO L276 IsEmpty]: Start isEmpty. Operand 27687 states and 66296 transitions. [2022-03-01 17:06:23,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:23,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:23,651 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:23,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:23,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 17:06:23,852 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:23,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1713544174, now seen corresponding path program 103 times [2022-03-01 17:06:23,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:23,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818173633] [2022-03-01 17:06:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:23,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:23,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:23,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818173633] [2022-03-01 17:06:23,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818173633] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:23,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287370963] [2022-03-01 17:06:23,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:06:23,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:23,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:23,905 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:23,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:06:23,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:24,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:24,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287370963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:24,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:24,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:06:24,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207365869] [2022-03-01 17:06:24,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:24,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:06:24,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:24,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:06:24,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:06:24,098 INFO L87 Difference]: Start difference. First operand 27687 states and 66296 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:24,626 INFO L93 Difference]: Finished difference Result 33459 states and 79150 transitions. [2022-03-01 17:06:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:06:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:24,681 INFO L225 Difference]: With dead ends: 33459 [2022-03-01 17:06:24,681 INFO L226 Difference]: Without dead ends: 33417 [2022-03-01 17:06:24,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:06:24,682 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 185 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:24,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 266 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:24,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33417 states. [2022-03-01 17:06:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33417 to 27981. [2022-03-01 17:06:25,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27981 states, 27980 states have (on average 2.398141529664046) internal successors, (67100), 27980 states have internal predecessors, (67100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:25,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27981 states to 27981 states and 67100 transitions. [2022-03-01 17:06:25,236 INFO L78 Accepts]: Start accepts. Automaton has 27981 states and 67100 transitions. Word has length 33 [2022-03-01 17:06:25,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:25,236 INFO L470 AbstractCegarLoop]: Abstraction has 27981 states and 67100 transitions. [2022-03-01 17:06:25,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:25,237 INFO L276 IsEmpty]: Start isEmpty. Operand 27981 states and 67100 transitions. [2022-03-01 17:06:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:25,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:25,258 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:25,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-01 17:06:25,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:25,459 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:25,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:25,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1516990898, now seen corresponding path program 104 times [2022-03-01 17:06:25,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:25,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069790392] [2022-03-01 17:06:25,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:25,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:25,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:25,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:25,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069790392] [2022-03-01 17:06:25,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069790392] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:25,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758235346] [2022-03-01 17:06:25,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:06:25,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:25,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:25,507 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:25,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:06:25,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:06:25,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:25,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:25,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758235346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:25,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:25,729 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:06:25,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627853605] [2022-03-01 17:06:25,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:25,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:06:25,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:25,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:06:25,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:06:25,730 INFO L87 Difference]: Start difference. First operand 27981 states and 67100 transitions. Second operand has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:26,386 INFO L93 Difference]: Finished difference Result 31375 states and 74465 transitions. [2022-03-01 17:06:26,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:06:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:26,441 INFO L225 Difference]: With dead ends: 31375 [2022-03-01 17:06:26,442 INFO L226 Difference]: Without dead ends: 31353 [2022-03-01 17:06:26,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:06:26,442 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 131 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:26,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 258 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:26,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31353 states. [2022-03-01 17:06:26,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31353 to 28442. [2022-03-01 17:06:26,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28442 states, 28441 states have (on average 2.3948876621778417) internal successors, (68113), 28441 states have internal predecessors, (68113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:26,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28442 states to 28442 states and 68113 transitions. [2022-03-01 17:06:26,960 INFO L78 Accepts]: Start accepts. Automaton has 28442 states and 68113 transitions. Word has length 33 [2022-03-01 17:06:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:26,961 INFO L470 AbstractCegarLoop]: Abstraction has 28442 states and 68113 transitions. [2022-03-01 17:06:26,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 28442 states and 68113 transitions. [2022-03-01 17:06:26,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:26,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:26,983 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:26,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-01 17:06:27,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:27,191 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:27,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash -264469234, now seen corresponding path program 105 times [2022-03-01 17:06:27,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:27,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737019224] [2022-03-01 17:06:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:27,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:27,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:27,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737019224] [2022-03-01 17:06:27,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737019224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:27,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587005057] [2022-03-01 17:06:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:06:27,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:27,236 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:27,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:06:27,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:06:27,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:27,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:27,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:27,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:27,454 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:27,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587005057] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:27,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:27,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:06:27,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386786454] [2022-03-01 17:06:27,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:27,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:06:27,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:27,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:06:27,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:06:27,455 INFO L87 Difference]: Start difference. First operand 28442 states and 68113 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:28,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:28,112 INFO L93 Difference]: Finished difference Result 35592 states and 84293 transitions. [2022-03-01 17:06:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:06:28,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:28,186 INFO L225 Difference]: With dead ends: 35592 [2022-03-01 17:06:28,186 INFO L226 Difference]: Without dead ends: 35582 [2022-03-01 17:06:28,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=809, Invalid=2053, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:06:28,187 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 178 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:28,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 308 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35582 states. [2022-03-01 17:06:28,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35582 to 29983. [2022-03-01 17:06:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29983 states, 29982 states have (on average 2.395337202321393) internal successors, (71817), 29982 states have internal predecessors, (71817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29983 states to 29983 states and 71817 transitions. [2022-03-01 17:06:28,998 INFO L78 Accepts]: Start accepts. Automaton has 29983 states and 71817 transitions. Word has length 33 [2022-03-01 17:06:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:28,998 INFO L470 AbstractCegarLoop]: Abstraction has 29983 states and 71817 transitions. [2022-03-01 17:06:28,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 29983 states and 71817 transitions. [2022-03-01 17:06:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:29,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:29,022 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:29,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-01 17:06:29,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-01 17:06:29,224 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:29,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1102448206, now seen corresponding path program 106 times [2022-03-01 17:06:29,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:29,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497548223] [2022-03-01 17:06:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:29,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:29,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:29,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497548223] [2022-03-01 17:06:29,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497548223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:29,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854630962] [2022-03-01 17:06:29,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:06:29,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:29,272 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:29,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:06:29,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:06:29,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:29,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:29,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:29,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854630962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:29,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:29,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-03-01 17:06:29,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017096628] [2022-03-01 17:06:29,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:29,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:06:29,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:29,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:06:29,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:06:29,474 INFO L87 Difference]: Start difference. First operand 29983 states and 71817 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:30,217 INFO L93 Difference]: Finished difference Result 39533 states and 93839 transitions. [2022-03-01 17:06:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-01 17:06:30,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:30,287 INFO L225 Difference]: With dead ends: 39533 [2022-03-01 17:06:30,287 INFO L226 Difference]: Without dead ends: 39531 [2022-03-01 17:06:30,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=2679, Unknown=0, NotChecked=0, Total=3906 [2022-03-01 17:06:30,288 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 169 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:30,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 275 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:30,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39531 states. [2022-03-01 17:06:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39531 to 32701. [2022-03-01 17:06:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32701 states, 32700 states have (on average 2.3938837920489298) internal successors, (78280), 32700 states have internal predecessors, (78280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32701 states to 32701 states and 78280 transitions. [2022-03-01 17:06:31,104 INFO L78 Accepts]: Start accepts. Automaton has 32701 states and 78280 transitions. Word has length 33 [2022-03-01 17:06:31,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:31,105 INFO L470 AbstractCegarLoop]: Abstraction has 32701 states and 78280 transitions. [2022-03-01 17:06:31,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:31,105 INFO L276 IsEmpty]: Start isEmpty. Operand 32701 states and 78280 transitions. [2022-03-01 17:06:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:31,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:31,132 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:31,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-01 17:06:31,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-01 17:06:31,334 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:31,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:31,334 INFO L85 PathProgramCache]: Analyzing trace with hash -867300082, now seen corresponding path program 107 times [2022-03-01 17:06:31,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:31,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519815435] [2022-03-01 17:06:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:31,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:31,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:31,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519815435] [2022-03-01 17:06:31,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519815435] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:31,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719233212] [2022-03-01 17:06:31,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:06:31,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:31,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:31,380 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:31,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:06:31,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:06:31,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:31,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:31,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719233212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:31,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:31,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-03-01 17:06:31,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793535956] [2022-03-01 17:06:31,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:31,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:31,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:31,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:31,620 INFO L87 Difference]: Start difference. First operand 32701 states and 78280 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:32,418 INFO L93 Difference]: Finished difference Result 46041 states and 109158 transitions. [2022-03-01 17:06:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-01 17:06:32,418 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:32,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:32,505 INFO L225 Difference]: With dead ends: 46041 [2022-03-01 17:06:32,506 INFO L226 Difference]: Without dead ends: 46041 [2022-03-01 17:06:32,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:06:32,507 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 197 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:32,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 262 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46041 states. [2022-03-01 17:06:33,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46041 to 40567. [2022-03-01 17:06:33,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40567 states, 40566 states have (on average 2.3920524577232163) internal successors, (97036), 40566 states have internal predecessors, (97036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40567 states to 40567 states and 97036 transitions. [2022-03-01 17:06:33,458 INFO L78 Accepts]: Start accepts. Automaton has 40567 states and 97036 transitions. Word has length 33 [2022-03-01 17:06:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:33,459 INFO L470 AbstractCegarLoop]: Abstraction has 40567 states and 97036 transitions. [2022-03-01 17:06:33,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 40567 states and 97036 transitions. [2022-03-01 17:06:33,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:33,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:33,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:33,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:33,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:33,689 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:33,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:33,689 INFO L85 PathProgramCache]: Analyzing trace with hash 487952296, now seen corresponding path program 108 times [2022-03-01 17:06:33,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:33,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461995927] [2022-03-01 17:06:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:33,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:33,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:33,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:33,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461995927] [2022-03-01 17:06:33,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461995927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:33,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147293632] [2022-03-01 17:06:33,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:06:33,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:33,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:33,722 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:33,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:06:33,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-01 17:06:33,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:33,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:33,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:33,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147293632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:33,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:33,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 8] total 16 [2022-03-01 17:06:33,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031572928] [2022-03-01 17:06:33,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:33,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:06:33,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:33,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:06:33,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:06:33,912 INFO L87 Difference]: Start difference. First operand 40567 states and 97036 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:34,788 INFO L93 Difference]: Finished difference Result 45487 states and 107865 transitions. [2022-03-01 17:06:34,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:06:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:34,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:34,867 INFO L225 Difference]: With dead ends: 45487 [2022-03-01 17:06:34,867 INFO L226 Difference]: Without dead ends: 45481 [2022-03-01 17:06:34,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1091, Invalid=2449, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:06:34,868 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 214 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:34,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 248 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:34,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45481 states. [2022-03-01 17:06:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45481 to 39993. [2022-03-01 17:06:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39993 states, 39992 states have (on average 2.389602920584117) internal successors, (95565), 39992 states have internal predecessors, (95565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39993 states to 39993 states and 95565 transitions. [2022-03-01 17:06:35,675 INFO L78 Accepts]: Start accepts. Automaton has 39993 states and 95565 transitions. Word has length 33 [2022-03-01 17:06:35,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:35,675 INFO L470 AbstractCegarLoop]: Abstraction has 39993 states and 95565 transitions. [2022-03-01 17:06:35,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:35,675 INFO L276 IsEmpty]: Start isEmpty. Operand 39993 states and 95565 transitions. [2022-03-01 17:06:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:35,701 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:35,701 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:35,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-01 17:06:35,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-03-01 17:06:35,902 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash -18393970, now seen corresponding path program 109 times [2022-03-01 17:06:35,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:35,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464427203] [2022-03-01 17:06:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:36,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:36,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464427203] [2022-03-01 17:06:36,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464427203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:36,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931855755] [2022-03-01 17:06:36,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:06:36,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:36,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:36,108 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:36,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:06:36,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:36,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:36,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:36,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:36,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:36,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931855755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:36,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:36,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-03-01 17:06:36,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737006761] [2022-03-01 17:06:36,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:36,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:06:36,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:36,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:06:36,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:06:36,315 INFO L87 Difference]: Start difference. First operand 39993 states and 95565 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:36,972 INFO L93 Difference]: Finished difference Result 45917 states and 108842 transitions. [2022-03-01 17:06:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:06:36,972 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:36,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:37,058 INFO L225 Difference]: With dead ends: 45917 [2022-03-01 17:06:37,058 INFO L226 Difference]: Without dead ends: 45893 [2022-03-01 17:06:37,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:06:37,059 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 249 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:37,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 212 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45893 states. [2022-03-01 17:06:37,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45893 to 41022. [2022-03-01 17:06:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41022 states, 41021 states have (on average 2.388825235854806) internal successors, (97992), 41021 states have internal predecessors, (97992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41022 states to 41022 states and 97992 transitions. [2022-03-01 17:06:38,045 INFO L78 Accepts]: Start accepts. Automaton has 41022 states and 97992 transitions. Word has length 33 [2022-03-01 17:06:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:38,045 INFO L470 AbstractCegarLoop]: Abstraction has 41022 states and 97992 transitions. [2022-03-01 17:06:38,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41022 states and 97992 transitions. [2022-03-01 17:06:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:38,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:38,082 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:38,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:38,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:38,319 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1722942188, now seen corresponding path program 110 times [2022-03-01 17:06:38,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:38,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849019941] [2022-03-01 17:06:38,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:38,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:38,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:38,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849019941] [2022-03-01 17:06:38,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849019941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:38,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783302571] [2022-03-01 17:06:38,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:06:38,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:38,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:38,373 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:38,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:06:38,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:06:38,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:38,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:38,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:38,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783302571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:38,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:38,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:06:38,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276925427] [2022-03-01 17:06:38,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:38,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:06:38,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:06:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:06:38,575 INFO L87 Difference]: Start difference. First operand 41022 states and 97992 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:39,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:39,195 INFO L93 Difference]: Finished difference Result 48036 states and 113852 transitions. [2022-03-01 17:06:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:06:39,196 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:39,284 INFO L225 Difference]: With dead ends: 48036 [2022-03-01 17:06:39,284 INFO L226 Difference]: Without dead ends: 47994 [2022-03-01 17:06:39,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:06:39,284 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 223 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:39,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 247 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:39,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47994 states. [2022-03-01 17:06:40,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47994 to 43024. [2022-03-01 17:06:40,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43024 states, 43023 states have (on average 2.388420147363038) internal successors, (102757), 43023 states have internal predecessors, (102757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43024 states to 43024 states and 102757 transitions. [2022-03-01 17:06:40,324 INFO L78 Accepts]: Start accepts. Automaton has 43024 states and 102757 transitions. Word has length 33 [2022-03-01 17:06:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:40,324 INFO L470 AbstractCegarLoop]: Abstraction has 43024 states and 102757 transitions. [2022-03-01 17:06:40,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 43024 states and 102757 transitions. [2022-03-01 17:06:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-01 17:06:40,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:40,354 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:40,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-01 17:06:40,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-01 17:06:40,554 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1041543218, now seen corresponding path program 111 times [2022-03-01 17:06:40,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:40,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039792431] [2022-03-01 17:06:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:40,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:40,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:40,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:40,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039792431] [2022-03-01 17:06:40,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039792431] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:40,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896936221] [2022-03-01 17:06:40,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:06:40,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:40,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:40,607 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:40,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:06:40,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:06:40,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:40,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-01 17:06:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:40,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:40,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896936221] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:40,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:40,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:06:40,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758853968] [2022-03-01 17:06:40,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:40,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:06:40,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:40,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:06:40,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:06:40,823 INFO L87 Difference]: Start difference. First operand 43024 states and 102757 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:41,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:41,593 INFO L93 Difference]: Finished difference Result 49178 states and 116640 transitions. [2022-03-01 17:06:41,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:06:41,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-01 17:06:41,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:41,717 INFO L225 Difference]: With dead ends: 49178 [2022-03-01 17:06:41,717 INFO L226 Difference]: Without dead ends: 49118 [2022-03-01 17:06:41,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:06:41,718 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 163 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:41,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 270 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49118 states. [2022-03-01 17:06:42,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49118 to 44346. [2022-03-01 17:06:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44346 states, 44345 states have (on average 2.387529597474349) internal successors, (105875), 44345 states have internal predecessors, (105875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:42,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44346 states to 44346 states and 105875 transitions. [2022-03-01 17:06:42,899 INFO L78 Accepts]: Start accepts. Automaton has 44346 states and 105875 transitions. Word has length 33 [2022-03-01 17:06:42,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:42,899 INFO L470 AbstractCegarLoop]: Abstraction has 44346 states and 105875 transitions. [2022-03-01 17:06:42,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 44346 states and 105875 transitions. [2022-03-01 17:06:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:06:42,936 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:42,936 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:42,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-01 17:06:43,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 17:06:43,137 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash -2050889375, now seen corresponding path program 112 times [2022-03-01 17:06:43,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:43,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46782614] [2022-03-01 17:06:43,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:43,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:43,185 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:43,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:43,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46782614] [2022-03-01 17:06:43,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46782614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:43,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942975659] [2022-03-01 17:06:43,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:06:43,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:43,187 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:43,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:06:43,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:06:43,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:43,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:06:43,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:43,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:43,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942975659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:43,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:43,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:06:43,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407077585] [2022-03-01 17:06:43,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:43,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:06:43,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:43,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:06:43,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:43,427 INFO L87 Difference]: Start difference. First operand 44346 states and 105875 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:43,634 INFO L93 Difference]: Finished difference Result 48008 states and 114788 transitions. [2022-03-01 17:06:43,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:06:43,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:06:43,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:43,769 INFO L225 Difference]: With dead ends: 48008 [2022-03-01 17:06:43,770 INFO L226 Difference]: Without dead ends: 47969 [2022-03-01 17:06:43,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:43,770 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 40 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:43,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 253 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:06:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47969 states. [2022-03-01 17:06:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47969 to 45223. [2022-03-01 17:06:44,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45223 states, 45222 states have (on average 2.3889036309760736) internal successors, (108031), 45222 states have internal predecessors, (108031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45223 states to 45223 states and 108031 transitions. [2022-03-01 17:06:44,781 INFO L78 Accepts]: Start accepts. Automaton has 45223 states and 108031 transitions. Word has length 36 [2022-03-01 17:06:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:44,782 INFO L470 AbstractCegarLoop]: Abstraction has 45223 states and 108031 transitions. [2022-03-01 17:06:44,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 45223 states and 108031 transitions. [2022-03-01 17:06:44,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:06:44,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:44,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:44,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-01 17:06:45,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 17:06:45,023 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:45,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1969878243, now seen corresponding path program 113 times [2022-03-01 17:06:45,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:45,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985093701] [2022-03-01 17:06:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:45,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:45,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:45,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985093701] [2022-03-01 17:06:45,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985093701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:45,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132756966] [2022-03-01 17:06:45,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:06:45,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:45,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:45,082 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:45,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:06:45,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:06:45,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:06:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:45,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:45,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132756966] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:45,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:45,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:06:45,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337480926] [2022-03-01 17:06:45,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:45,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:06:45,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:06:45,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:45,327 INFO L87 Difference]: Start difference. First operand 45223 states and 108031 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:45,558 INFO L93 Difference]: Finished difference Result 52337 states and 125670 transitions. [2022-03-01 17:06:45,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:06:45,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:06:45,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:45,876 INFO L225 Difference]: With dead ends: 52337 [2022-03-01 17:06:45,877 INFO L226 Difference]: Without dead ends: 52292 [2022-03-01 17:06:45,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:45,877 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 39 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:45,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 256 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:06:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52292 states. [2022-03-01 17:06:46,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52292 to 46254. [2022-03-01 17:06:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46254 states, 46253 states have (on average 2.3954986703565173) internal successors, (110799), 46253 states have internal predecessors, (110799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46254 states to 46254 states and 110799 transitions. [2022-03-01 17:06:46,774 INFO L78 Accepts]: Start accepts. Automaton has 46254 states and 110799 transitions. Word has length 36 [2022-03-01 17:06:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:46,774 INFO L470 AbstractCegarLoop]: Abstraction has 46254 states and 110799 transitions. [2022-03-01 17:06:46,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 46254 states and 110799 transitions. [2022-03-01 17:06:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:06:46,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:46,816 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:46,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-03-01 17:06:47,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 17:06:47,017 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash 27416035, now seen corresponding path program 114 times [2022-03-01 17:06:47,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:47,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487560453] [2022-03-01 17:06:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:47,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:47,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:47,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487560453] [2022-03-01 17:06:47,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487560453] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:47,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118388536] [2022-03-01 17:06:47,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:06:47,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:47,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:47,083 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:47,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:06:47,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-01 17:06:47,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:47,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:06:47,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:47,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:47,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118388536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:47,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:47,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:06:47,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254346509] [2022-03-01 17:06:47,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:47,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:06:47,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:47,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:06:47,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:47,330 INFO L87 Difference]: Start difference. First operand 46254 states and 110799 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:47,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:47,747 INFO L93 Difference]: Finished difference Result 58013 states and 139928 transitions. [2022-03-01 17:06:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:06:47,748 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:06:47,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:47,865 INFO L225 Difference]: With dead ends: 58013 [2022-03-01 17:06:47,866 INFO L226 Difference]: Without dead ends: 57971 [2022-03-01 17:06:47,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:47,866 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 38 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:47,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 256 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:06:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57971 states. [2022-03-01 17:06:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57971 to 49604. [2022-03-01 17:06:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49604 states, 49603 states have (on average 2.411446888293047) internal successors, (119615), 49603 states have internal predecessors, (119615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49604 states to 49604 states and 119615 transitions. [2022-03-01 17:06:48,996 INFO L78 Accepts]: Start accepts. Automaton has 49604 states and 119615 transitions. Word has length 36 [2022-03-01 17:06:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:48,996 INFO L470 AbstractCegarLoop]: Abstraction has 49604 states and 119615 transitions. [2022-03-01 17:06:48,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:48,996 INFO L276 IsEmpty]: Start isEmpty. Operand 49604 states and 119615 transitions. [2022-03-01 17:06:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:06:49,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:49,040 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:49,055 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-01 17:06:49,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-01 17:06:49,241 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:49,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:49,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1055666851, now seen corresponding path program 115 times [2022-03-01 17:06:49,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:49,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382856129] [2022-03-01 17:06:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:49,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:49,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:49,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382856129] [2022-03-01 17:06:49,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382856129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:49,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624372254] [2022-03-01 17:06:49,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:06:49,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:49,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:49,293 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:49,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:06:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:49,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:06:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:49,424 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:49,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:49,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624372254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:49,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:49,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:06:49,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987603970] [2022-03-01 17:06:49,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:49,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:06:49,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:49,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:06:49,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:49,534 INFO L87 Difference]: Start difference. First operand 49604 states and 119615 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:50,017 INFO L93 Difference]: Finished difference Result 64349 states and 155624 transitions. [2022-03-01 17:06:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:06:50,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:06:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:50,162 INFO L225 Difference]: With dead ends: 64349 [2022-03-01 17:06:50,163 INFO L226 Difference]: Without dead ends: 64310 [2022-03-01 17:06:50,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:50,163 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 37 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:50,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 257 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:06:50,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64310 states. [2022-03-01 17:06:51,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64310 to 54487. [2022-03-01 17:06:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54487 states, 54486 states have (on average 2.4248797856330064) internal successors, (132122), 54486 states have internal predecessors, (132122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54487 states to 54487 states and 132122 transitions. [2022-03-01 17:06:51,483 INFO L78 Accepts]: Start accepts. Automaton has 54487 states and 132122 transitions. Word has length 36 [2022-03-01 17:06:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:51,483 INFO L470 AbstractCegarLoop]: Abstraction has 54487 states and 132122 transitions. [2022-03-01 17:06:51,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:51,483 INFO L276 IsEmpty]: Start isEmpty. Operand 54487 states and 132122 transitions. [2022-03-01 17:06:51,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-01 17:06:51,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:51,527 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:51,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:51,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-01 17:06:51,732 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:51,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:51,732 INFO L85 PathProgramCache]: Analyzing trace with hash 911371171, now seen corresponding path program 116 times [2022-03-01 17:06:51,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:51,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79637507] [2022-03-01 17:06:51,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:51,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:51,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:51,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79637507] [2022-03-01 17:06:51,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79637507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:51,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869661469] [2022-03-01 17:06:51,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:06:51,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:51,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:51,778 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:51,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:06:51,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:06:51,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:51,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:06:51,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:51,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:52,007 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:06:52,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869661469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:52,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:52,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-01 17:06:52,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55433797] [2022-03-01 17:06:52,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:52,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:06:52,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:52,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:06:52,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:52,008 INFO L87 Difference]: Start difference. First operand 54487 states and 132122 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:52,301 INFO L93 Difference]: Finished difference Result 72236 states and 174914 transitions. [2022-03-01 17:06:52,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:06:52,302 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-01 17:06:52,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:52,721 INFO L225 Difference]: With dead ends: 72236 [2022-03-01 17:06:52,721 INFO L226 Difference]: Without dead ends: 72206 [2022-03-01 17:06:52,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:06:52,721 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 36 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:52,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 256 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:06:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72206 states. [2022-03-01 17:06:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72206 to 71835. [2022-03-01 17:06:53,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71835 states, 71834 states have (on average 2.423044797728095) internal successors, (174057), 71834 states have internal predecessors, (174057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71835 states to 71835 states and 174057 transitions. [2022-03-01 17:06:54,095 INFO L78 Accepts]: Start accepts. Automaton has 71835 states and 174057 transitions. Word has length 36 [2022-03-01 17:06:54,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:54,095 INFO L470 AbstractCegarLoop]: Abstraction has 71835 states and 174057 transitions. [2022-03-01 17:06:54,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 71835 states and 174057 transitions. [2022-03-01 17:06:54,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 17:06:54,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:54,179 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:54,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-01 17:06:54,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-01 17:06:54,380 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:54,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1225885554, now seen corresponding path program 117 times [2022-03-01 17:06:54,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:54,381 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735740986] [2022-03-01 17:06:54,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:54,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:54,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:54,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735740986] [2022-03-01 17:06:54,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735740986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:54,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314336993] [2022-03-01 17:06:54,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:06:54,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:54,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:54,440 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:54,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:06:54,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:06:54,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:54,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:06:54,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:54,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:54,923 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:54,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314336993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:54,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:54,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-03-01 17:06:54,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891543775] [2022-03-01 17:06:54,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:54,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:06:54,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:54,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:06:54,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:06:54,925 INFO L87 Difference]: Start difference. First operand 71835 states and 174057 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:55,467 INFO L93 Difference]: Finished difference Result 87796 states and 212272 transitions. [2022-03-01 17:06:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:06:55,467 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-01 17:06:55,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:55,669 INFO L225 Difference]: With dead ends: 87796 [2022-03-01 17:06:55,669 INFO L226 Difference]: Without dead ends: 87796 [2022-03-01 17:06:55,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:06:55,669 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:55,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 260 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:06:55,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87796 states. [2022-03-01 17:06:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87796 to 72340. [2022-03-01 17:06:57,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72340 states, 72339 states have (on average 2.4224692074814413) internal successors, (175239), 72339 states have internal predecessors, (175239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72340 states to 72340 states and 175239 transitions. [2022-03-01 17:06:57,496 INFO L78 Accepts]: Start accepts. Automaton has 72340 states and 175239 transitions. Word has length 39 [2022-03-01 17:06:57,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:06:57,496 INFO L470 AbstractCegarLoop]: Abstraction has 72340 states and 175239 transitions. [2022-03-01 17:06:57,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:57,496 INFO L276 IsEmpty]: Start isEmpty. Operand 72340 states and 175239 transitions. [2022-03-01 17:06:57,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 17:06:57,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:06:57,579 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:06:57,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-01 17:06:57,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:57,779 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:06:57,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:06:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1232517124, now seen corresponding path program 118 times [2022-03-01 17:06:57,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:06:57,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445422302] [2022-03-01 17:06:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:06:57,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:06:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:06:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:57,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:06:57,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445422302] [2022-03-01 17:06:57,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445422302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:06:57,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174261628] [2022-03-01 17:06:57,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:06:57,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:06:57,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:06:57,839 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:06:57,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:06:57,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:06:57,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:06:57,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:06:57,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:06:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:57,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:06:58,036 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:06:58,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174261628] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:06:58,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:06:58,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2022-03-01 17:06:58,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498303459] [2022-03-01 17:06:58,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:06:58,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:06:58,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:06:58,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:06:58,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:06:58,038 INFO L87 Difference]: Start difference. First operand 72340 states and 175239 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:06:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:06:58,864 INFO L93 Difference]: Finished difference Result 103043 states and 246926 transitions. [2022-03-01 17:06:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:06:58,865 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-01 17:06:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:06:59,118 INFO L225 Difference]: With dead ends: 103043 [2022-03-01 17:06:59,118 INFO L226 Difference]: Without dead ends: 102999 [2022-03-01 17:06:59,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=225, Invalid=645, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:06:59,118 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 162 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:06:59,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 174 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:06:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102999 states. [2022-03-01 17:07:00,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102999 to 72340. [2022-03-01 17:07:00,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72340 states, 72339 states have (on average 2.4224415598777975) internal successors, (175237), 72339 states have internal predecessors, (175237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72340 states to 72340 states and 175237 transitions. [2022-03-01 17:07:01,102 INFO L78 Accepts]: Start accepts. Automaton has 72340 states and 175237 transitions. Word has length 39 [2022-03-01 17:07:01,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:01,102 INFO L470 AbstractCegarLoop]: Abstraction has 72340 states and 175237 transitions. [2022-03-01 17:07:01,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 72340 states and 175237 transitions. [2022-03-01 17:07:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 17:07:01,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:01,187 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:01,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:01,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:01,387 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:01,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1424049078, now seen corresponding path program 119 times [2022-03-01 17:07:01,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:01,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409678827] [2022-03-01 17:07:01,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:01,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:01,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:01,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409678827] [2022-03-01 17:07:01,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409678827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:01,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423893973] [2022-03-01 17:07:01,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:07:01,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:01,445 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:07:01,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:07:01,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-01 17:07:01,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:07:01,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:01,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:01,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423893973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:01,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:01,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-01 17:07:01,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670926769] [2022-03-01 17:07:01,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:01,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:07:01,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:01,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:07:01,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:07:01,660 INFO L87 Difference]: Start difference. First operand 72340 states and 175237 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:03,404 INFO L93 Difference]: Finished difference Result 115613 states and 277046 transitions. [2022-03-01 17:07:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-01 17:07:03,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-01 17:07:03,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:03,965 INFO L225 Difference]: With dead ends: 115613 [2022-03-01 17:07:03,965 INFO L226 Difference]: Without dead ends: 115597 [2022-03-01 17:07:03,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4223 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2730, Invalid=7170, Unknown=0, NotChecked=0, Total=9900 [2022-03-01 17:07:03,966 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 469 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:03,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 343 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:07:04,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115597 states. [2022-03-01 17:07:05,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115597 to 85080. [2022-03-01 17:07:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85080 states, 85079 states have (on average 2.432468646787104) internal successors, (206952), 85079 states have internal predecessors, (206952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85080 states to 85080 states and 206952 transitions. [2022-03-01 17:07:06,019 INFO L78 Accepts]: Start accepts. Automaton has 85080 states and 206952 transitions. Word has length 39 [2022-03-01 17:07:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:06,019 INFO L470 AbstractCegarLoop]: Abstraction has 85080 states and 206952 transitions. [2022-03-01 17:07:06,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 85080 states and 206952 transitions. [2022-03-01 17:07:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 17:07:06,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:06,110 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:06,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:06,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:06,310 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:06,311 INFO L85 PathProgramCache]: Analyzing trace with hash 728697012, now seen corresponding path program 120 times [2022-03-01 17:07:06,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:06,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928925074] [2022-03-01 17:07:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:06,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:06,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928925074] [2022-03-01 17:07:06,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928925074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:06,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805641282] [2022-03-01 17:07:06,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:07:06,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:06,370 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:07:06,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:07:06,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-01 17:07:06,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:06,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:07:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:06,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:06,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805641282] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:06,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:06,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-01 17:07:06,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617673986] [2022-03-01 17:07:06,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:06,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:07:06,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:06,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:07:06,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:07:06,900 INFO L87 Difference]: Start difference. First operand 85080 states and 206952 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:07,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:07,973 INFO L93 Difference]: Finished difference Result 95032 states and 229951 transitions. [2022-03-01 17:07:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:07:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-01 17:07:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:08,190 INFO L225 Difference]: With dead ends: 95032 [2022-03-01 17:07:08,191 INFO L226 Difference]: Without dead ends: 95028 [2022-03-01 17:07:08,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1640, Invalid=3190, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:07:08,192 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 242 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:08,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 413 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:07:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95028 states. [2022-03-01 17:07:10,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95028 to 86959. [2022-03-01 17:07:10,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86959 states, 86958 states have (on average 2.435647093999402) internal successors, (211799), 86958 states have internal predecessors, (211799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:10,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86959 states to 86959 states and 211799 transitions. [2022-03-01 17:07:10,525 INFO L78 Accepts]: Start accepts. Automaton has 86959 states and 211799 transitions. Word has length 39 [2022-03-01 17:07:10,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:10,525 INFO L470 AbstractCegarLoop]: Abstraction has 86959 states and 211799 transitions. [2022-03-01 17:07:10,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 19 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:10,526 INFO L276 IsEmpty]: Start isEmpty. Operand 86959 states and 211799 transitions. [2022-03-01 17:07:10,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 17:07:10,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:10,614 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:10,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-01 17:07:10,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:10,815 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1867392592, now seen corresponding path program 121 times [2022-03-01 17:07:10,815 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:10,815 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860376920] [2022-03-01 17:07:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:10,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:10,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:10,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860376920] [2022-03-01 17:07:10,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860376920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:10,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166206873] [2022-03-01 17:07:10,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:07:10,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:10,874 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:07:10,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:07:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:10,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:07:10,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:11,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:11,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166206873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:11,078 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:11,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-01 17:07:11,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858579391] [2022-03-01 17:07:11,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:11,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:07:11,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:11,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:07:11,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:07:11,079 INFO L87 Difference]: Start difference. First operand 86959 states and 211799 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:12,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:12,723 INFO L93 Difference]: Finished difference Result 96305 states and 232642 transitions. [2022-03-01 17:07:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-01 17:07:12,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-01 17:07:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:12,933 INFO L225 Difference]: With dead ends: 96305 [2022-03-01 17:07:12,933 INFO L226 Difference]: Without dead ends: 96305 [2022-03-01 17:07:12,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2216, Invalid=4426, Unknown=0, NotChecked=0, Total=6642 [2022-03-01 17:07:12,934 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 255 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:12,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 408 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:07:13,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96305 states. [2022-03-01 17:07:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96305 to 83214. [2022-03-01 17:07:14,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83214 states, 83213 states have (on average 2.4312667491858244) internal successors, (202313), 83213 states have internal predecessors, (202313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:15,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83214 states to 83214 states and 202313 transitions. [2022-03-01 17:07:15,208 INFO L78 Accepts]: Start accepts. Automaton has 83214 states and 202313 transitions. Word has length 39 [2022-03-01 17:07:15,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:15,208 INFO L470 AbstractCegarLoop]: Abstraction has 83214 states and 202313 transitions. [2022-03-01 17:07:15,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:15,208 INFO L276 IsEmpty]: Start isEmpty. Operand 83214 states and 202313 transitions. [2022-03-01 17:07:15,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 17:07:15,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:15,296 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:15,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Forceful destruction successful, exit code 0 [2022-03-01 17:07:15,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 17:07:15,496 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:15,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:15,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1515665840, now seen corresponding path program 122 times [2022-03-01 17:07:15,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:15,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125823742] [2022-03-01 17:07:15,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:15,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:15,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:15,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125823742] [2022-03-01 17:07:15,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125823742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:15,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028619359] [2022-03-01 17:07:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:07:15,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:15,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:15,578 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:07:15,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:07:15,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:07:15,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:15,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:07:15,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:15,761 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:15,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:15,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028619359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:15,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:15,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-01 17:07:15,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511022160] [2022-03-01 17:07:15,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:15,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:07:15,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:15,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:07:15,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:07:15,831 INFO L87 Difference]: Start difference. First operand 83214 states and 202313 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:17,271 INFO L93 Difference]: Finished difference Result 112915 states and 270630 transitions. [2022-03-01 17:07:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-01 17:07:17,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-01 17:07:17,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:17,540 INFO L225 Difference]: With dead ends: 112915 [2022-03-01 17:07:17,540 INFO L226 Difference]: Without dead ends: 112909 [2022-03-01 17:07:17,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2022-03-01 17:07:17,541 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 470 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:17,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 279 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:07:17,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112909 states. [2022-03-01 17:07:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112909 to 76444. [2022-03-01 17:07:19,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76444 states, 76443 states have (on average 2.4206402155854687) internal successors, (185041), 76443 states have internal predecessors, (185041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76444 states to 76444 states and 185041 transitions. [2022-03-01 17:07:19,891 INFO L78 Accepts]: Start accepts. Automaton has 76444 states and 185041 transitions. Word has length 39 [2022-03-01 17:07:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:07:19,891 INFO L470 AbstractCegarLoop]: Abstraction has 76444 states and 185041 transitions. [2022-03-01 17:07:19,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 76444 states and 185041 transitions. [2022-03-01 17:07:19,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-01 17:07:19,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:07:19,968 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:07:19,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-01 17:07:20,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-01 17:07:20,169 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:07:20,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:07:20,169 INFO L85 PathProgramCache]: Analyzing trace with hash -2022012106, now seen corresponding path program 123 times [2022-03-01 17:07:20,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:07:20,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047022040] [2022-03-01 17:07:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:07:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:07:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:07:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:20,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:07:20,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047022040] [2022-03-01 17:07:20,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047022040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:07:20,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261044692] [2022-03-01 17:07:20,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:07:20,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:07:20,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:07:20,226 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:07:20,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:07:20,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:07:20,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:07:20,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-01 17:07:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:07:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:20,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:07:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:07:20,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261044692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:07:20,433 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:07:20,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2022-03-01 17:07:20,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64910800] [2022-03-01 17:07:20,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:07:20,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:07:20,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:07:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:07:20,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:07:20,434 INFO L87 Difference]: Start difference. First operand 76444 states and 185041 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:07:21,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:07:21,759 INFO L93 Difference]: Finished difference Result 107640 states and 257630 transitions. [2022-03-01 17:07:21,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:07:21,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-01 17:07:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:07:22,025 INFO L225 Difference]: With dead ends: 107640 [2022-03-01 17:07:22,025 INFO L226 Difference]: Without dead ends: 107616 [2022-03-01 17:07:22,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2022-03-01 17:07:22,025 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 403 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:07:22,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 258 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:07:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107616 states.